The Milepost Book is great. I also found that if you use the facilities at local Visitors Center (free WIFI) make sure you pick up the local guide book. They are free have a lot more local info and maps. And, the biggest plus is the latest road conditions going up the road.
One place to watch out for sure is the Sign Forest at Lake Watson. I left mine with my name and homebase. Make up one in advance of your trip.
YNCM USN-Retired (64-90)
RVN (Tet 68)
2015 Thor Vegas 24.1