I wouldn't think frying beacon inside the van is a good idea but very few RV's have had problems. Normal food storage seems to be OK. Not saying it can't happen but I don't worry and I'm up there on a regular basis. Cooking pasta and stuff like that inside is fine. If your really paranoid you can sprinkle fine pepper powder around
they really avoid that. I just keep my eyes peeled while cooking outside and don't set up a huge kitchen. Cook then clean it up and store it. Around the fire I keep the beer chest out close to me but stow it in the bear box before nite. As for my BBQ, I just leave the top off. Usually they just lick it or sniff it. Rangers can be kind of bothered if trash is left out...could result in a fine. Even a coon can make a mess out of trash. At night I've had bears follow right behind me and stare as I open the locker...that'll make you jump when you turn around...just close it and walk away if it happens. It seems like they are waiting for you to feed them just like a dog. Amazing how quiet they can be.
BTW Yosemite creek CG is nice but you might want to look at Tamarack Flat. I've found you're able to find more secluded spots there and if you can get # 45??? in Porcupine that's a great site as well but your not close to the top of Yosemite falls, a highlite of Yosemite Creek. Maybe I'll see you up there.
Dave