You might be able to run both ac's with 30 amps, but would need to start them at different times most likely, and very few other electronics.
You might look around, I've seen a few sites that only had 30amp service, but every place we've been has 50 available at some sites. (If not at all sites). For Alot of the Corp parks you can find that info on the web, and reserve some sites as well.
We are in Chandler, Oklahoma just a little north of you. We have yet to stay at a spot without 50 amp. We've been to several around Eufaula, Keystone, and Chandler and Stroud.
And yes if you get a bigger trailer you will need both a/cs here in Ok.
Millertime- Sabre Handler