By the way, Heather and I are going to Yosemite. Her list is for solo, just in case I run my car off a cliff in the next week (or get sick). So assuming that all goes well, I will provide and carry the bear canister and we can also share my stove. Given the wet trail conditions in Yosemite (I was there last weekend) I would still recommend wading/camp shoes. I'm taking crocks. The actual backpacking will total 2.3 days food, not 4. The 4-day period includes driving there and back from San Jose. Two nights out max. We will consolidate first aid gear. She is bringing enough clothing in case it is really cold - likely we will pare this down based on the most current weather report. I use chlorine tabs for water purification, but I never assume others would like this method- it is light but has its drawbacks. Good suggestions given so far. I may even adopt a few myself!