Durango1, Just finished the WRT loop two days ago. Go for it, but watch the weather!! For us, in our 2006 Tundra and 2014 FWC Hawk, it was an excellent trip. Good friends, great weather, clear night sky with no moon, great camper, dry roads and little head-on traffic. There were several places where height and width could be troublesome, depending on your comfort level. But, we made it through with only a few scapes and dents. In several areas we had 2-3 inches of clearance on the passenger's side (ragged rock wall) and 3-4 inches on the driver's side (sheer drop off). The roads were dry for us, but I can certainly see where it could be tricky and/or dangerous if it was wet or raining.
No problem with trees, but rock overhangs occur in several areas. Our Tundra Double cab is not lifted, and with the Hawk, I'm glad we were not lifted and did not have anything on the roof taller than the vents and solar panel. There was less than a foot of height clearance. Not being lifted, we also scarped front/rear/bottom 2-3 times on several dips and sharp climbing turns. But, nothing I'm concern with. Overall, the size of the trail was almost like it was made specifically for us. It would not be that memorable if it was wide and easy.
The FWC Hawk worked perfect, however we had to make a couple modifications to it on the trail. The trail is a bit bumpy in areas, and it seems we knocked our silverware out of the drawers several times. The refrigerator door also popped open a couple times, so we tied a rope across it. We also, wisely, the day before we headed out, added a rough boot-cleaning type door mat to the the bottom step climbing into the camper. It saved a lot of dirt from getting in.
Watch the weather and have good tires with strong sidewalls. Overall, one of the best trips we have been on. Enjoy...