I have two 30A RV plugs on my garage for when friends visit and the odd time my RV is on the driveway.
I would really like to have buried power for my RV storage spot which is on the other end of the house. Right now, my 50A power cord plugs into my 30A extension through a dogbone which plugs into a 30/15 adapter plugged into an outdoor GFI receptacle on the house. All of that is lying on the ground. Only problem is the RV is about 50 cable-feet from the house and that corner of the house is about 100 cable-feet from the breaker panel. Mucho moola. I'm toying with the idea of burying properly sized cable but hooking it in the house to an existing 15A circuit until my budget can afford heavy cable to a 50A breaker on the panel.