In reply to Sam Curley:
You'd be better off on three pebble slab practicing for Snake Dyke, Royal Arches and Tuolumne There's barely a jam in sight! Here's a link to a trip up Snake Dyke to inspire you (and you'll find a few other recommended routes around the same time on the blog) https://rockaroundtheworld.co.uk/2015/09/20/snake-dike/
In terms of camping advice, Camp 4 is a "must do" part of The Valley pilgrimage, but will involve a very early start to get in the queue and you'll be limited to a week max at that time of year. Tuolumne has a campground which also has "first come first served" spaces and a bit less pressure. It's a gorgeous place and I'd +1 the recommendation to spend some time there. There are also other less popular campgrounds between the two, eg White Wolf and Porcupine Flats, which allow both to be reached albeit by a lengthy commute.
Also, yes to "all food in bear boxes" (which are available throughout the park) including meat. You can buy a cheap ice box (or often pick up a discarded one from a dumpster) and keep it topped up with ice from the store. I'd only buy meat the day you plan to cook it though.
Enjoy!