As far as trails go, they are all good. If you follow the signs to any of the staging areas, there are usually maps at the notice board. There are about 3 hundred miles in East Fort Rock OHV riding area. I would pick a route that goes around the outside of the area something like trails 30/40 and 10/25. There could be some snow especially on East Butte and China Hat Butte, but I wouldn't worry about it.
So much riding-so little time