Your trailer is a 30 Amp connector. The rating is on a plat near the power cord storage spot, or connector if you have the marine style system.
You may want to get a 50 to 30 AMP Dog bone in case you get stuck in a 50 AMP site in the future. 17.00 at CW.
50 Amp connections are normally for he bigger trailers and Motorhomes that use two air conditioners. Unless of course it is a classic Airstream motorhome, then it still uses 30 AMP but has 2 Ac's You can only run one of them when plugged in.
WBCCI #5501 AIR # 49
1978 Argosy 28 foot Motorhome
Wise men talk because they have something to say; fools, because they have to say something. -- Plato