I plan on going!
Aetna is fun, as was mentioned, I took my stock TJ (worn out 30" GS-A's) thru there. The hardest part was the first section, going from the path up to the actual mountain, the big holes and stuff, without some basic flex ans grippy tires can be tough, but other then that, there should be no problem. This place is one of my favorites.
My TJ is still stock to many, 1"BL/MML, discoed and 31" M/T, yet it totally transformed it off-road, made it rather capable, actually I found this setup to be fun, atleast for me.... keeps things a challenge but lets me keep up. Next mod is a tummy tuck, which includes oil pan skid - i don't know how many more bashes that thing can take.