Thanks all! For those who are retired military ( or still active duty) I found an excellent book that identifies every military affiliated campground in the US and provides details such as number of sites available, costs, details for reservations and so forth. I find it a very useful book. It is available here:
https://militaryliving.com/2020-rv-c...-available-now
Another excellent reference guide I found is a book called 'next exit". It details what is available at every exit on every Interstate highway in the US. Another very valuable book. I found it here:
https://www.amazon.com/Next-Exit-201...0079397&sr=8-1
David