That is a fantastic trip!
My buddy Steve and I rode Lockhart a couple of years ago. But since we were on bikes we didn't do the side trip at the Eightmile Rock overlook. Took us about 8 hours to do the 59 miles from the FR122 trailhead (basically we started at the National Park gate) back to Moab McDonalds!
'91 Pickup - Imelda / '08 Tacoma TRD - Donna
'09 Kawasaki KLR650
'98 Rhygin Juke SS / '12 Gunnar Rockhound 29 / '16 REEB Dikyelous
"Our task must be to free ourselves from this prison by widening our circle of compassion to embrace all living creatures and the whole of nature in its beauty. Nobody is able to achieve this completely, but the striving for such achievement is in itself a part of the liberation and a foundation for inner security. " --Albert Einstein