Like others, we generally never consider what businesses are near the RV Park. That being said, we would avoid parks that are near obvious businesses that would detract from the park. We wouldn't want to stay at a park next to a steel recycling plant, a sewer treatment plant, a feedlot or a prison.
I doubt it will be possible in most areas of Florida to build a park with recreational amenities that would exceed the amenities currently available. By that I mean you won't be able to build pools better than nearby Waterparks. I doubt any golf course on your property will be better than those accessible to the public, be it regular golf or mini-golf.
Your location will drive your clientele. If you are near Disneyland, expect a park full of Disney visitors. If you are next door to a strip club, expect a lot of vans with dark tinted windows. If you want to build in a very rural area, expect your customer base to be budget oriented. Likewise, if you build oceanfront on Miami Beach don't market to the "I'll never pay more than $25.00 a night" crowd unless you want to lose a whole lot of money. Good Luck.