Welcome to the forum Robert!
As the old saying goes… Location, Location, Location.
You can go both ways… there are great parks in the city limits and great parks outside of the city. I think part of having any great product, service, park, etc… is having the right marketing as well.
Location is key, but what will you do to let people know about it? What makes your park better than others?
What would be your ROI? What value do you bring to the area?
How much tourism/travel happens in that area of the country? What does the traffic look like in the areas you are looking to buy?
Are there any places to go and visit/sight see around those areas for land purchase?
Just my thoughts. Hope that helps!