Lots of good information here. First, thank your husband for his service. Personally I retired after 29 yrs. and now full time all over the US. I used Tricare standard until I got For Life and Medicare, never had a problem ANYWHERE getting service. Meds come via Express Scripts to our South Dakota mail service t?en general delivery where ever we are.
We use MWR's to get up todate info after looking at
Military Campgrounds and if non available then we use Passport America (1/2 price campgrounds), KOA, GS and often COE (Corps of Engineers) sites. Also there are lots of county and state campgrounds that are cheaper.
Good luck and don't worry too much about making the transition to this life style. Once you do it you'll wonder why more people don't do this!