In reply to ssstrick:
There are nowhere near enough campsites in the Dolomites and they aren't ideally suited for getting early starts which you should always try to do (there's a lot of loose rock for other parties who got on the route first to knock down on you and it often rains/thunders etc in the afternoons).
Officially wild camping is illegal but drive over the Sella/Falzarego/Gardena Pass etc in the evening or early morning and you'll see dozens of campervans and tents pitched up for the night because the campsites were full or too pricey. Remember, this is Italy not Switzerland, they don't give f*** about rules.
The cheapest campsite I've stayed on was 27 euros for 2 people + car + tent and the most expensive was 40 euros, which is why people wild camp. Some also have an overnight curfew with a barrier so you can't get out before 7 or 8am which is a pain.
If you do camp rough I wouldn't leave your tent up during the day, even up in the mountains as it gets very busy with tourists crawling all over the place.
Fuel is also very expensive in Italy so fill your car up before you leave Austria.
By alpine standards, the huts are relatively cheap, if you plan to climb a few routes in the same area it might be cheaper to bite the bullet and stop in a hut rather than get the cable cars up every day (which will also allow you to get on the rock first). You can take your own stove and cook outside the huts as the price of meals will nearly double the cost of a hut. There are however plenty of routes to do which can be accessed from the road so you don't need to stay in the mountains to get stuff done.