Upgrade to 50amp?
No.
It's the nature of the RV beast. Plugging in the hair dryer being the one culprit for blowing a breaker when the air is on.
When the ac is on you can NOT plug in a hair dryer, toaster, micro or sometimes even a coffee pot. You just LEARN not to do it. The longer you RV the more it will become something you do without even thinking.
'Everyone' that owns an RV has the exact same problem. Owners with 50 amp have the same problem also when plugging in too many things at one time.
These RV's are not your 200 amp panel in your stick home that you are accustom to! :W