If I winterized, I would definitely get one of those kits, too.
My shore power cord molded plug did fine on our recent outing - no hot plug, so I will let my "butter container plastic strip rolled into a barrel as a gap bridge" fix stand as a permanent solution to the cord-plug gap.
The dogs enjoyed many walks, even saw bison in a state park in Minnesota. Plus Red and Peanut were bad and escaped out the open RV door to tree a cat at a friend's country home.
31k miles on the rig now, and all is in top shape. Seemed to get consistent 11.5+ mpg in the midwest, but back South, a measly 10 mpg. Altitude, humidity, or maybe just the rough grades of I-55 through north Mississippi (long slight grades where it has to work going up AND down).
I am wondering a bit about the life of the chassis battery as it is approaching 5 years age. Any opinions?
I have also wondered how the whole electrical system works, and asked questions on a current separate thread.
My interest in the electrical system probably stems from the fact that, if I disconnect the house battery and put my boat battery charger to it, it charges up nicely overnite and holds it nicely at a good high voltage. But if I leave the house cables attached to the battery while charging, it seems to strain - takes much longer to full charge, doesn't hold full charge or good high voltage. It's like it needs to give up 10-20% to the system as a 'tax' It bugs me not to know why, I guess...and I feel it may shorten the life of the house battery.