Brad Caldwell has been bouldering in and around GHSP for several years, and has 20+ years of bouldering and boulder field development under his belt. Check out what he has to say about the GHSP Bouldering Guidebook:
http://www.cruxn.com/grayson-highlands-bouldering-guidebook-review/#comment-40936
Grayson Highlands Bouldering 
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