Blasted Lady Bugs

It's been about 4 weeks since our last trip and what with one thing and another we decided this season was done and we'd winterize. We hadn't been in Rocky since we got back other than to run the vacuum. Opened up today and the blasted Lady Bugs have returned. They love the large rear window which gets a lot of sun. DH and I captured a bunch and escorted them out the door, but I even found some in the vents between the screen and the cover and I swear they weren't there last trip. I had planned to ask our bug guy to spray the trailer anyway when he comes this month, but any suggestions on getting them gone? Anyone ever use foggers for this?? I may have to wait for the bug guy, but those little critters multiply like crazy.