I've run poison spider and hells revenge with 285's and J's in an 80 with no sliders and suffered no damage to the rockers. factory hitch got lots of use. Honestly of the trails you mention the biggest threat to rockers is definitely porcupine rim. There is one section that if you aren't careful, you'll crunch them, but there is an alternate line you can get around with. I have run that trail in a 4Runner with 32's and an FJ60 with 31's. The FJ60 actually did get a small dent in the rocker. But it only had a 2" lift and I wasn't careful at all driving that truck
I think you'll be fine if you're careful in the 80 with 35's and J's.