Having tried many types of cat litter with our rabbit, the wood based stuff is definately the best smell wise as it just tends to smell of pine. You can compost it (we do) as the wood is biodegradable and the urine acts to speed up the process. Garderners often advise to apply directly to the heap! Even if you put it in the bin, you have the reassurance of knowing that it disintergrates quickly. It doesn't need a huge amount so I'd suggest buying a bag and taking a smaller bag with you.
Tried this last weekend at Cornbury Festival. Was excellent - would definitely recommend it. Had trouble getting the wood based cat litter beforehand though (for info - Wilkos had it on offer!).
Amazing family weekend with old steam engines, classic car displays, market stalls, and full catering and bar. And camping on site - Save £25 by booking in advance.