Ok all you got to do is remember the rules according to Reddy Killowatt
50 amps.. All the electricty your RV can eat (Usually)
30 amps. ONLY ONE air conditioner and ONE other "Big ticket" (and sometimes not even that) Big Ticket is Microwave or Water heater or space heater (See note below)
20 amps.. ONE a/C OR one big ticket item but not both if RC i only item on circuit
15 Amps. if the batteries are full up you MIGHT get one A/C to work but iffy. or one big ticket.
NOTES
15 amp outlet two paralll blades 20 the neutral is turned 90 degrees. The more common 15/20 (Takes either plug) the Neutral is "T" shaped.
Space heaters: I have special 15/20 amp circuits for mine the standard RV wiring may or may not take the load. I had one failure. others have had worse.