None of the trails are long enough to run out of fuel, but are time consuming. I quit carrying fuel for me years ago, but do sometimes have fuel for others on the trail. I had ten gallons on the rear bumper on a swing out. Never used it one time. I do carry water at all times though. Remember to keep everything as low as you can get it, nothing on the roof if you can keep from putting it high. I don't think it is quite as bad on that Taco, but the FJ is a little top heavy anyway. I almost lost one on Black Bear about 9 years ago. But his roof most likely had 40 gallons of fuel, roof top ten, awning, shovel and axe, High lift jack. We some times get to involved with the preparedness side of the story.. Good tires, good sliders and winch, and a spare the same size are the most important for me. I run 35's on the FJ, locked on both ends, but seldom if ever use the front lockers. I hate the damned things to be honest.
Does the truck have crawl control Rob. That makes just about any trail very easy. I don't have it on my FJ, and am thinking about buying a 2012 Red TRD because of it. I think they started it that year, but may have been the following year.
The one thing you will tear up on any serious off road vehicle are the wheels. Bead locks are nice and very pricey. I have never had them, and never needed them. But have seen people rip the tires off of one side and then destroy part of their truck to trying to move it.
Nothing at the Summit is difficult, other than maybe Poughkeepsie on a rainy day. The rest are much easier than either of these.