Just by chance,I know some trails out that way,mostly off of road 313 and Ive heard there are others. We used to drag dirtbikes out to Hull Rd/road 313 and unload at about 3500' and ride singletrack all over the place.
When you want to try some Ragdump singletrack I know every trail up that way,including some brand new ones. Put the stock tank on the 350,take any extras off and you have a great singletrack bike!
My 200XCW is the ultimate cheater bike up that way.