In reply to areks1111:
Ive used my brother's VauDe Hoagan ultralight a bit, and I got it wrecked (my fault - it's an ultralight tent, not designed for very high winds), VauDe replaced the broken pole sections free of charge, and I was able to repair the flysheet. I would strongly recommend them as a manufacturer, though as with some of the others on here, the dome tent wouldn't be my first choice, their other tents are probably stronger and/or lighter. for long distance backpacking I would tend towards something smaller and lighter than that.
With regards to wild camping, yes it is legal. Wild camping means what it says though, not roadside camping, nor 30 people for a week. There is IIRC also a legal requirement on you to act responsibly, and respect other users, particularly the landowners. If you make a mess, wantonly interrupt a shoot etc. you can loose your right to camp. If it's you and a friend, camping high, cleaning up after yourselves and moving on each day, you will be absolutely fine.