I've also got manual 2012 rubicon with 3.5" lift, 35s, bumper, winch, Ursa Minor camper top (6" taller and a few hundred pounds). After my 3 week camping trip to UT/AZ/NV/CA I'm leaning toward 4.88 again now as well. I'll probably lose a little mileage (15-17 with this setup is surprisingly good!) but I only drive it 12 days a month when I'm home anyway. I didn't buy it for gas mileage. I just want to to still be comfortable cruising at 70-75. I regeared another rig from 4.10s to 4.88s and it felt really low at first, but performance was amazing. With only 33" tires it ran a little high on the rpms at 80 though. I never got better than 14mpg from it after that.