The notion that there arent enough people going to Mexico to justify the update of the church book is less than convincing.
For one thing the Mex Govt own tourist arrival numbers show that travel is greatly increased for the last two years. (these are border crossings not just airline arrivals)
Californians alone make up tens of thousands of trips to the Baja every year in their campers and MH's...This has been going on since I was a kid. They dont' need a book.
I think the real reason is the cost to update the book vs the sales just doesnt make sense for the authors. I think they may have their eyes on other destinations.
As for going to their site for updates: for the Baja there were almost none and those were old (this is when I looked about three months ago)
Many of the other Baja web sites are VERY out of date or worse yet they dont attach a date to the site or say when it was last updated.
I bought the Church book despite it's being so out of date, It may be useful as a baseline. But frankly I'd rather use the Moon book as it includes so much more information.
Self publishing can be tough and expensive, updating the book can be very time consuming and also expensive. I would like to see them do an update but I am not holding my breath.
Meantime, by using all the sources available to me I gathered enough names and websites of RV parks the entire length of the Baja to know that there will not be a shortage of places to stay.