As far as NF ground, since that is PUBLIC LAND, I don't believe they can legally close off access to it. If you got a ticket and went to court I believe you would prevail. As far as fee sites they may be able to close those, but as far as regular USFS and BLM controlled ground I think a big NO is in order.
Have been trying to get a ticket, but no luck so far.....
1981 Cherokee W/T, 360, T-18, Warn 8274 in custom bumper/deer strainer (tested and approved)
1988 Cherokee 4 door, 3" Rancho lift, custom sliders/steps, custom roof rack, custom camo paint, custom camo headliner, custom bumpers and Warn 9500 HS, 31-10.50's
Only 31's, but can drag self with either rig
BLM John Day/Snake RAC-OHV/Recreation Representative
Wolfpack 4x4's - Region 5 - "Cave Lupum"
Pres.- Outcast Land Use Review Team