I've got no more info than could be gleaned from the web page,
http://www.r5.fs.fed.us/mendocino/troughfire/index.htm
The one map showing the boundary where public access is restricted includes far more area than the acreage reported burned. Most of the restricted access area is well north of the trail system, so I'm hopeful that the trail newtork is not being damaged.
Fouts Springs/Davis Flat is at the south of the restricted boundary - fire crews are probably using that area and don't want to deal with OHV users, so trails and access into Fouts Springs show closed on the maps.
Looks to me like you could stage at Little Stony and ride the southern and western trails, but I would avoid the area until the fire is out due to smoke.