Yosemite Valley has way too many buses, tourists, cabins, etc. Okay to visit (once) if you need to take a tour with small children or people unable to walk much. Backpacking east of Yosemite is still good. Agnew Meadows to 1000 Island Lake, for example. Day hiking in the park is nice if you start high enough, like in Tuolumne meadows. (But you do have to be able to handle the 8500+ foot altitude, and you do have to follow some simple rules about black bears.)