There is absolutely no reason to consider buying a gray tree frog over catching one in your back yard. I would say 100% of them available are WC but they say nothing is 100% so 99.9% of them are WC. Do yourself and your next frog a favor, catch one from your back yard and save it the stress of shipping.

My personal opinion is that you should not feel guilty about taking a couple of grays from the wild either. These are not an endangered species and they adapt very well to captivity. I'm sure there will be a few opposing viewpoints and in general I am opposed to WC but that is more on the commercial side. It would be a very very rare occurance for an individual taking a few specimens of such a common species to have any negative effect on their population. If you prefer gray tree frogs by all means get them.

As for breeding them I would say good for you. Don't plan on doing it for the money though. Very few people are willing to make the effort because they can't make money on them. Did I mention you probably won't make money on them. Very few dealers and few consumers are willing pay extra for a CBB gray tree frog baby when WC adults are available so cheaply or for free. If I could legally sell them I would consider a small premium over WCs (same for greens or barkers or anoles) but not much because I would have to convince my customers why spending say $8.99 or $9.99 for a small baby, even if it is captive bred, is better than getting an adult for $5.99 or $6.99 and I know it would not be easy. The way it is now I don't offer any of those species because no one breeds them and I don't deal with WC.

If you try your hand at raising them you may find yourself stuck with hundreds of froglets you don't know what to do with. I suppose, depending on the legality of it, you could always let them go but I know here in Wisconsin it is illegal to release specimens into the wild.

I do appreciate your concerns about the whole WC issue but as far as I am concerned you need not beat yourself up over it. The fact that you are concerned tells me that you would not abuse the situation. Take a few grays and enjoy them. They are my favorite frog.