X2 on D.E.
I do a perimeter spray with Home Defense, around tires, jacks and hoses. A little vaseline on cords and hoses discourage their use as an access point.
Food Grade D.E. is nontoxic and it mixes into the ground and continues to work. It works on any insect with an exoskeleton. Tractor Supply, Amazon, Vet supply.
It should be more acceptable than borax, comet, ajax, etc.to campground owners and gov. parks.
I have seen good results with the Terro Granules outside and inside the house but have not used it around the MH.
04 Allegro 30DA, WH 8.1, Banks, 03 Honda CRV/2012 Jeep Liberty Jet, Brake Buddy Adv Select, 300watts Solar, 7 Group 31 Optima AGMs, 2000watt PSW inverter
"Philippians 4:11-13 KJV"