Split Peak is a 14er just south and east of Mather Pass. It’s not an easy climb from the road, but from the JMT it’s pretty easy and close to the trail. Just south of the pass, head off-trail east, around the south shore of the lake, up to the Split-Prater saddle, and up to the top. It’s pretty apparent on the map and looking from Mather Pass.
All the camps we made were pretty memorable, so you would do well with no advice at all. That said, from north to south:
Sunrise Camp in Tuolumne, looking out over the meadow
Above Ruby Lake there is a shelf with some rock-chairs. We did get visited by a bear there, so have your tent clean and your food canned.
Purple Lake was beautiful, but the only really bad mosquito place when we went.
My favorite camp was probably on the way to Split Peak, off the trail, alongside the lake. Expect marmots.
markv