Here are two input options for you to considered if you go this route:
The first is a 20 amp twist on that will need a step down adapter from 30 to 20 amp
The second is a 30 amp that can be connected directly to the 30amp splitter via the right extension cord. This option would be desired, since it would let you add additional outlets in the bedroom without taking away from the factory 30amp feed, which is already close to being maxed out with AC, converter etc.
1994 30' Excella Front Kitchen Trailer
1992 350LE Classic Motorhome