https://www.casinocamper.com
also amazon sells a book
Casino-Camping-8th-RV-Friendly-Casinos
I've never had an issue
but I do call ahead and inquire about parking as the last thing you want is to get in and not be able to get out or try to go where you don't have the overhead clearance.
security will roust you if sleeping in a car or van as not allowed
but those that welcome rver's will not bother you in an rv.
I've never felt unsafe
but than again the 357 under my pillow alway's makes me feel secure