With a T18 you're going to be pushing it even with a CV style shaft, especially if it's lifted enough for 35s. Add 6.5" inches of driveline length and you're past the limits of operating angles even with a CV shaft. It might work if you had a CJ7, but not with a CJ5.
Wheeling up at Walker is as you make it. There is bypasses on some of the harder stuff. The group of guys I go with has quite a bit of experience. We took a kid with a stock axle Cherokee on 31s with us and he made it with just a little body damage. I wheel my CJ open at both ends for a little more challenge. Sure, guys with lockers can muscle up stuff, but it takes driving skill to do it with out lockers. I always laugh at people who can't make an obstacle while locked front and rear, but I do it open. The best advice I could give is to put some rocker guards on your Jeep. Nothing that sticks out, but something you can put the Jeep on a rock and pivot around. Lockers always help, as do good tires. The terrain there goes from mud to rocks, on any trail. I like my BFG Mud Terrain KMs. I usually air down to about 10psi.
Guys with lockers were having all sorts of issues on this one. I walked right up it.