I've had my share of flat tires on Trail Ck road (and in other people's rigs), and a punctured gas tank - but I would think coming in 12 miles from Hwy 93 wouldn't be much cause for concern. The worst section is the other (Sun Valet) end, up, over and down the hill. They've sprayed most of the road over the last couple of years to help keep it glued together and keep the dust down. It's much nicer than it was 5, 10, 15... years ago.
P.S. Make sure you have air in the spare, just in case