You can plug your trailer into an 110V outlet at your home. I plug my 5ER into the 110V, 20 AMP outlet all of the time to run the fridge and lights when needed.
You will need a 3 prong 110 adapter plug that will adapt to either a 30 AMP or 50AMP cord which ever your camper uses. Just remember that you cannot use the A/C in the trailer.
2016 34RL CC; 2008 Ram Mega Cab 2500HD, 6.7L, 68RFE 6 speed, 4X4, Smarty S67, TDR 135K+miles