If you use pads your babies may be a bit confused in the new surroundings that move. Most RV rentals will charge extra for pets, (sometimes a lot) and extra for damage/cleaning. You might want to consider throwing pads or covers of some sort over all upholstery.
Make sure that whatever you have on the floor, like giant beer cooler that won't fit in the basement storage, is bungeed to something. Otherwise when your idiot DH slams on the brakes at a stoplight it won't careen the entire 31ft and move everything out of its path including the kids, water bowls, food etc.. this causes much screaming and gnashing of teeth.
And for your personal safety tell him to take his foot off the gas in the mountain curves and not use the cruise control, at 65mph it will, if you are standing by the bathroom, throw you onto the toilet causing you to pee your pants, nearly smash a baby and invent an entirely new vocabulary.
But I digress. It appears that your list is about as complete as can be, may want to add baby wipes. Can't think of anything much else. You're gonna love it. As long as your DH didn't use to drive a big rig and thinks he still is...
