In reply to Jon Thorne:
I spent a year. My itinerary was:
Summer: Dolomites, swiss alps, chamonix
Autumn: Verdon, Catalonia (mainly terradets and siurana)
Winter: Sperlonga, Sicily, Finale
Spring: Verdon, Tarn, Cornwall, Wales South then North.
Summer: Scotland NW.
I found that a month in one place was nice for having time to project stuff, feel like I had plenty of time to relax and not feel rushed.
I think I spent about 600-700 euros a month but I was making no effort to live cheap, when I bought food, I bought what I liked (within reason) and I was solo for a lot of the time so fuel was all my expense. I was actually buying wood, tools, etc. to finish the conversion at various DIY stores across France, Spain and Italy, doing things like making nice drawers to replace plastic boxes and so on. Often had a day or two parked up in a nice isolated forest just sawing, drilling and screwing.
Also, just now the Euro is very cheap, so your pounds will go about 20% further than mine did.
Assuming you don't stay at campsites then your budget breaks down pretty much like this:
Fuel - work out your mpg and work out how far you plan driving and come up with a sum.
Food - buying in big supermarkets will right now be similar to UK cost (though expect to pay more for luxury foods) because Euro is strong. So work out how much your food is when in the UK and that's that worked out.
Gas - Hopefully you have a cooker that runs on a big (4kg or bigger) gas canister. This means you will only get shafted a few times. Every time you buy a new cylinder, you will be buying a new adapter for about 20-30 euros and paying a new deposit on a cylinder which you will probably never get back. Budget about 60-80 euros per gas refill therefore. I went through 3 in a year but I don't cook as much as most and don't do tea and coffee at all. (always buy propane ofc, never butane or a mix).
Lift pass - if you go to Cham or other alpine places where you need a lift pass, its a big whack of money. Add it in if you want to go to one of these places.
Other costs - If you want to do things on the cheap, there is very little else you really need consider. You can probably add in some money for novelty hats and sunglasses or maybe tourist attractions in big cities if you are that way inclined. I'd probably say, have 500 euros set aside for repairs to the van if something does go wrong (combine talking foreign with being a tourist and any repair bill will be well over the odds).
I never had any problems with parking my camper up somewhere and just sleeping there. Obviously you don't take the mick by parking 100 yards down the road from a camp site or right outside somebodies house. In a lot of popular climbing areas, there are specific layby/informal carpark areas where there are several/lots of people.
The only place I paid for camping was a few nights in Wales because Wales and England are the only countries in Europe (besides a few specific bits of Switzerland) where there are signs everywhere saying "no overnight, etc. etc." and finding a quiet area without angry signage can be tricky.
Partners:
Some places I'd never really want to turn up and try and find partners. E.g. The dolomites; it is possible to find a partner there but combine long commiting routes on trad with a very dispersed set of climbing locations and it's clear that you don't really want to. Some places like Siurana it's quite easy to find partners and you can often watch them belay other people first if you are a bit suspicious of their experience/safety.
To catagorise the places I went by whether I would go looking for a partner:
NO - Dolomites, swiss alps, Cornwall, Scotland NW.
Tricky - Chamonix, Finale, Sperlonga, Wales.
Fairly feasible - Verdon, Catalonia, Sicily, Tarn
I had arranged with various people to meet them at different places during the year, so sometimes I had an arranged partner, sometimes I was on my own.
If you plan on going with someone for the whole year, be honest about how you feel about that person!! I have some friends I think I would get on fine with for a year but others that, after a couple weeks, I am just starting to get wound up by. You are going to be living in this persons pocket; climbing with them, cooking with them, sleeping with them, chilling with them - same van, same occupation all the time. You really need to get along well if you are going to last the year.
When you are alone, you will meet a lot more other people. Not only do you approach people more readily but you are more readily approachable because you are not in the process of talking on climbing with someone already.
If you have not already looked into insurance. Get ready for a total pain in the bum. Your van is self-converted (btw, if you didn't already, take photos and apply to the DVLA to reclassify it as a "motor caravan") and you area looking for 12 months European cover and you will probably want 15k miles in terms of usage. Almost every company will not touch you for one of the below reasons:
-Your camper wasn't made by a reputable conversion company.
-They have no 12 month EU cover policies.
-Their idea of a "campervan" is something that a person uses rarely for holidays, so their mileage cap is 10k or 12k miles at the very most.