There's a fair bit of trail, that you can ride North of Picket Post. Just not all the way thru to the Lake. I've been out to Roger Trough
http://www.aztrail.org/passages/pass_19.html and then ridden S towards Picket Post. That's the shuttle way when you camp with the wife, you could ride up the 2 wheel road or a 4 wheel road to make a loop.
That's
http://www.aztrail.org/passages/pass_18.html it's not Wilderness so we're legal. The next two passages are Wilderness, pretty sure Scott and Lee are the only ones to do Gunsight Gap. After the 4 Peaks we had worked out a way to rejoin
http://www.aztrail.org/passages/pass_21.html at FR 422, this worked a couple of times but fires have kept it off the table.
So far no one is complaining that the AZTR course is too easy, so I doubt we'll see either of these segments added to the race course anytime soon.