I'm mainly a road worrier (commuting on roads on this bike for over 8,000 miles) and I have been all my life but I've done a little MTB. The problem is, I don't have a lot of MTB technical skills so rocky single tracks have me walking a bit. I load the bike on the car for specific SOTA missions when I know the terrain will work out for me (mainly an old road that is closed). At other times, I'll take it when going into an area that I'm not sure about, in case the road is blocked or ends sooner than expected. The Forest Service does this at times but still allows bike travel (I don't use it to get into closed areas).