I think you'll find the trails on the JMT an absolute pleasure to walk. The rocky sections there are not what we would consider very rocky here. Remember these trails are made for horse packers and never get too steep relatively speaking. The major difference is out here you hike the P.U.D.S and there you go up,up,up and then down,down,down. Still your going at a good pace and vacation time is vacation time but man, are you gonna want more time to hang around!
-Reds Meadow has beer and a $9.00 double cheese burger thats sooo worth it. the burgers a Toulumne are thin and over priced. The cook at VVR is good and a good guy, youll get good home style meals there(and did I mention beer).
Edison Lake is very low and the boat taxi only comes at certain times, I found it wayyy too hot to sit there on the sun exposed dock waiting for a boat that may never come and I just hiked the 5 miles or so there.
-The JMT is perfect bivy country IMO it hardly ever rains and you usually have fair warning before it does.
I only found mosquitoes at Deer river crossing and maybe one or two isolated places, a few places have aggressive ants and you will defiantly want to have protection from them.