We took a massive 10 man dome tent and took down all the internal rooms to make it bigger, on the warmer nights we slept outside the tent anyway.
In regards to gear, take one set of every tool you have, its a good idea to take a brake bleeding kit as well. I would definately recommend dual ply tyres and spare brake pads. a spare mech hanger and gear cables are good things to have as well.
Lastly, have an awesome time, I went 4 weeks ago for the first time and it was one of the best experiences of my life!!