We have a water filter and figure we'd use it as best we can so as not to need to carry more than our 3 lit bladders hold, though I admit I've thought it a good idea to carry an extra one just in case.

After the sleeping bags have been upgraded it seems the only real thing to upgrade is the pack, and that's all dependent on the length of the trip, if our daughter is with us, and how long.

I really will be glad when the wee one can carry her own stuff!!!