Yes, you would be nuts to take your TH on Poison Spider. :-) There have been other posts about it if you want to search.
For Hells Revenge, watch the video someone else posted.
Fins and Things could be a good one to try with lots of slickrock. A few here have done that.
Go to traildamage.com and search around the Moab area. Trails rated 4 or less would be what I would consider...
I've had my TH down to Moab multiple times. I would agree with much of the above. Poison Spider Mesa has received a lot of pressure and hence erosion over the years and is very rough. The entry switchbacks are difficult and very rough. If you are lucky, you might make it to the "waterfall" obstacle, but that may be it.
H's Revenge is doable if you do the go arounds and miss the named obstacles. Its called the "Tip Toe" route.
Fins and Things is very doable in the TH. I've done these last two. Tried Poison, its a no go. Tried Top of the World. Its also a no go in a TH.
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