Finding camping spots

I like AllStays app if you are looking in an area on their map -very handy. Small one time fee to buy the app. You can filter out what you don't need, or be sure you have the ones you want like state parks, etc

RVParkReviews.com is free and has also been a mainstay for me for researching comparison details including other campers' opinions and they have upgraded their format in recent years.