Bulging siding when towing in crosswind?

So we are at a KOA in Hardin, MT. Manager suggested 2 options in Billings. We are going to one of them at opening time tomorrow morning. He said the siding strips are stapled on and have pulled out. He plans to re-attach them quickly with some grommeted screws like used for metal roofing. It won't be perfect, but won't look too bad, and will keep the siding on the RV! We will add caulk around the screw penetrations.

I really suspect the crosswind had something to do with it, since this has never been a problem before.