PGA can get pretty crowded on weekends. Stealth's line is always the longest, at two to three hours, sometimes even longer. Top Gun is always pretty long, about an hour or so. Invertigo can get above an hour, simply because of the capacity. Other than that, Grizzly, Demon, Greased Lightnin and Vortex shouldn't have long lines. Everything else is minor. Psycho Mouse should get long lines this year though, simply because it's new.
As for SFMW, the weekends aren't as bad at PGA, because of the animal shows and attractions that ferry people away from the coasters. It can still get a little crowded in the lines though. I was there last year on a Sunday, and it was bad in the late afternoon. Medusa was an hour wait, which isn't too bad. Roar never seems to be over an hour, at least it hasn't been when I've been there. Kong, Boomerang and Cobra don't get exceedingly long lines either. As for the other attractions, they pretty much don't have long lines either. This has been my experience with the park so far. When V2 opens, it'll be a whole different ballgame though. Peace. :)
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Medusa at Marine World: the best coaster in the west!