In reply to theflapjackadventurer:
You've already been given the best advice, sort the rest of your life out and head up late Jan/Feb instead.
Failing that, buy, borrow or steal a decent van (or join the SMC,CC or FRCC etc. for cheap Hut access). Camping in December turns a mediocre plan into a really crap plan.
However, the general idea of heading up for 2-3 weeks is good in principal, so good luck in sorting some sort of plan.