Bring a huge can of extra strength raid.
I remember a couple of years ago my Wife and I got into Del Rio Late and the Motel 6 was booked solid. So we looked into the Desert Hills and they had vacancies and offered to let me check a room out.
I took the key and opened the door and everything looked good except for the woman asleep on the bed. Had she woke up it would have looked real bad, so I quietly closed the door and locked it.
When I got back to the office to let them know about the mistake there was another guy in there looking for a refund on the days he had not used yet. It seems that he paid for several days and the cockroaches were scaring his children (his words not mine). But the night manager said the owner is the only one that could give any kind of refund but they would be at home in Mexico all week.
I did not stay long enough to find out how that ended, I hope the guy got what he was asking for, it was reasonable. I just put the keys on the counter and left. I forget what Motel we stayed at that weekend, but after my little experience I was ready to tell my wife "we're sleeping in the car tonight honey".