Your trailer was designed to work best on 50amp service--if you only have 30amp, then you have to put up with the inconvenience. Just wait til you have some warm weather that requires the AC, then you will really know what inconvenience is.
Besides remembering to turn a resistance electrical device off before turning on another, I would really try to find a 50amp campsite so you don't have to worry so much about tripping a breaker.
However, if you have used the 30amp adapter a lot before this park, then it may well be the power pedestal causing the problem--of course, it is 'never the park's problem.'
Also, consider moving to another site within the park, or just get enough 30 amp extension cord to hook into the site next door and try it that way--just using a house extension cord won't work, has to be a 30amp extension cord.
2016 Tiffin 40 QBH
2015 38RSSA, traded
2005 TK3 #1869, 10 yrs of memories,
2017 F450 KR--one more Ford is it
2009 F450 4x4-died; 2010 F450-retired