Native Arkansas Tree Frog

[UncleChester]

I do prefer the appearance of Grays, but I also like the idea of keeping a native species, and honestly I have no idea where to find a gray treefrog.

Grays are native where you are, both species of them. They're dead easy to find in the spring during their breeding periods. Familiarize yourself with their calls then drive around areas with ponds or swamps on a warm, humid or wet spring evening with your windows down listening for them. Return to the ponds a few days after some major chorusing and collect eggs or return in a couple of weeks for tadpoles.

Has anyone set one this type of habitat for a green tree frog before?

They aren't likely to make much use of a major water feature. My Hyla cinerea is almost never on the ground, and my Hyla versicolors also rarely go down. The flipside of that is you can pretty much put what you want down on the ground with the only drawback of a higher number of crickets drowning in a larger water system.

Would a running park be a good spot to release him if I do? There's a nice creek and a lot of trees. Our backyard is also frequented by mosquito's, so if that would be as good a spot as any that would be nice.

Anywhere they are found naturally would work. If there's a swamp or pond nearby where you found it with lots of bushes or tress, that would probably be ideal.