I agree with your husband. I would wait.
My biggest worry was the trailer sitting on a lot for 2-4 weeks waiting to get delivered and having a leak and getting water damage. However, no leaks. Just got back from a 3 day trip everyone stayed dry. I washed the camper when we got back and nothing got inside so for now good to go. I also used a trick I found on here somewhere about turning 1-2 roof fans (make sure all windows and the door is closed) on when closing up to help suck the canvas in and that helps.
2008 F150 v8 5.4
2015Rockwood Roo 23SS
2015 Nights Camping: 39
2016 Reserved: 23