Thanks, Andy. Kayaking guide books on Baja are virtually non-existent, you're right. This one is probably as good as it can be. After reading example chapter Sta Rosa - Mulege, I would say, it is 60-70% right on. Eg., there are wilderness camps on San Marcos, but things changed after the 2006 hurricane, some coves are a mess, and the best coves are taken by fish camp and gypsum mine with port. There is a military base in Barra San Lucas, but there is no loud reveille heard at the Moseys RV park where I stayed, so he probably meant another camp to the South. There are on-water RV camps on Mulege river, but most of them are a trap during the low tide, 'cause the river is muddy and shallow. San Bruno is probably a good starting point for trips to Isla San Marcos, but from Barra San Lucas (Moseys camp) is both closer and more realistic for those flying with folder, since San Bruno has no bus connection. There is a water store in downtown Mulege, but the closest water store to any of listed 3 camps on Mulege river is the one at the West end of pedestrian river walk (no longer pedestrian, btw, since it's been paved). And so on...
Laminated Topo Almanac or boating charts of chosen sections are still necessary - aerial photos in this book are largely useless, too small scale. I would say, boating charts like those by
http://www.coastalwatersrec.com/content/view/42/79/ provide more visual info on the coastline, with marked possible campsites and descriptions of places of interest. This map doesn't list stores, but on a trip shorter than 30 days I bring all the food from Vancouver, properly re-packed and rationed.