I massacred a horde of them Saturday night, Bengal spray on all their regular haunts, specifically the vent screen in the front living room. I suppose it is more because its the hottest place in the camper, but they tend to congregate there and after spraying the screen liberally with Bengal spray I probably killed hundreds right there. Also the skylight in the bath and the vent in the bedroom. Went ahead and hit the ACs, returns and vents. Swept and vacuumed up tons of them. We will see if it lasts.
2016 Keystone Sprinter 334 FWFLS
2015 Ram 2500 Crew Cab 6.7L CTD 4x4 with Curt Q16 Slider