I agree with all the above! I use a hot glue gun to glue flexible window
screen over the insides of the bumper caps as well as on the inside of
the refrigerator access door. As others- I purchase the water heater
and furnace screens. Wasps are one reason I moved my spare tire from
the back bumper to inside the pass thru storage on one unit and under
the floor between frame rails on another..... Every time I pulled off the
spare tire cover to check pressure I knew there would be a wasp nest
in there somewhere
Wasp spray is a mandatory item when camping! I always open the power
post door veeeerrrrry carefully when we're hooking up or leaving.