Yeah, "normal" electric supply for a TT with one AC is 30 amps, and you'll probably need most of that.
Don't try to use the electric water heater unless you are plugged into 30-amp service. The AC alone will challenge a 20-amp circuit.
It's not hard to add a 30-amp circuit with a 30-amp RV receptacle from the breaker box in your house to near where you park the RV. Then you can run normal stuff in the RV without tripping a breaker. But even with 30-amp service, you can't run the AC, microwave, electric water heater, waffle iron, hair dryer, coffee pot, etc., etc., all at the same time.
Grumpy ole man with over 50 years towing experience. Now my heaviest trailer is a 7,000-pound enclosed cargo trailer, RV is a 5,600 pound Skyline Nomad Joey 196S, and my tow vehicle is a 2012 F-150 EcoBoost SuperCrew.