I hang in the national parks all the time. Only thing that will mess you up are those alpine trees that only look like you can hang on them... 12' straps and whoopie slings will do you fine, even if you're hanging from the medium sized sugar pines (the large ones are just too big).
Hey from central Cali. North Cali folks call us southern, South Cali folks call us northern, but we're just out here in the middle.
I actually recently moved down to OC from Atascadero. If you miss out on the lottery, another option is to hike it from the back side starting at Horseshoe Meadows if you can get time off for a longer trip. Its easier to get a permit (no dealing with the lottery). I did that trip in 5 days in 2009. You see a lot less people too!
The ultimate measure of a man is not where he stands in moments of comfort and convenience, but where he stands at times of challenge and controversy."