I carry the 50 to 30 and the 30 to 110v. When parked at home I plug the RV cord into the 50 to 30, and the 30 leg into the 30 to 110, and the 110v into an extension cord that reaches up to the house. One thing to note is that you should use a heavy-duty 110 extension cord because that cord gets hot.
Lastly, its not unusual to turn on too much stuff and have your home GFI pop and need a reset. Make sure you have the hotwater electric switch OFF. You new 5er should have all LED lights so lights aren't really an issue anymore (they were when incandescent was the norm).
2016 Wildcat 295RSX - 2015 GMC 2500HD DblCab Duramax/Allison 4x4 Z71 6.6' Bed
Maxxis 16" E; Ride Rite AirBags w/AirLift 1 wireless compr; Adv.Folding 4 Cover
Andersen Ultimate II Aluminum 5erhitch on Reese Flipball w/Curt 4" offset ball
LCI Ground Control 3.0 4pt + 2pt Elec.Rear stabilizers; 3 Slidecovers; 10ft. Portabote
6000# Dexters; mor/Ryde CRE3000 w/HD Wetbolts; King Dish Tailgater; 5hp Outboard
Dual A/C; Furrion 48 Rear Camera; Champion 3100 Inverter w/Extended Run