My trailer shore power cable connector has a snap lid that covers it when not in use.
I keep my 25-foot shore power cable coiled up inside a large bucket sitting inside the basement area when not in use.
I too use a 50-foot 10-gauge (10-3) extension cord that is plugged inside the garage to a 20A service receptacle and runs out to the trailers. The connection to the shore power cable is using a RV30A-15A long adapter which is just laying in the middle of the yard. I did at one time take a closed lid large plastic box and and cut slots on both sides for the shore power cable and extension cord to come in and out. Then I closed the lid after I hooked both ends to the RV30A-15A adapter. The whole adapter was inside the snap lid plastic box.
Haven't seen that box for a while now haha... I really don't see any problems with just plugging things together laying in the yard. I make sure water doesn't settle around the connections...
Of course the best thing would be is have the trailer parked close enough to the house and install a 30AMP connection on the outside of the house and just plug directly into that.
Roy Ken
