I like 30 amp service better than 50 amp even though my present TT has 50 amp.
30 sites are usually cheaper. Only a few bucks but cheaper.
30 cords, adapters, plugs and sockets are all smaller, lighter and cheaper.
It's easier to connect a 30A to my Honda generator.
I only have a 23' TT and I doubt there is any place to put a second A/C. I think the reason it was made with 50A service is because there is an optional electric fireplace that I don't have.
Unless you have some pressing need for the extra juice from 50A service I'd rather have the 30A.