I think the local folks would be able to confirm, but that's correct, the immediate area around DCHS it is not a designed OHV area. The following two links show where OHV use is allowed.
http://www.fs.usda.gov/recarea/sbnf/recreation/ohv/recarea/?recid=74079&actid=93
http://www.fs.usda.gov/Internet/FSE_DOCUMENTS/stelprdb5202570.pdf
mohave | california, usa | mohave@blacksbeachforum.com | http://www.blacksbeachforum.com