If you find yourself in that area, special emphasis should be placed on US 191 north and south of Moad for the National parks in that area.
UT 261 as it rolls north of US 191 just north of Mexican Hat. Its hard packed gravel with "a lot of bling". With a trike you won't have any issues.
UT 128 east of US 191 just north of Moab is also a great ride.
Heck....it's all good.....!!!