We recently sold our 40 foot dp class a and went with back to a fiver. We did it simply because a fiver fits our life style much better. I also upgraded from a F-250 srw to a new F-350 dually. I can say that with the few miles I pulled the fiver with the F-250 it was affected by the wind as much as our motor home. However by switching over to the F-350 and being as honest as I can wind does not affect it at all. The stability is almost unbelievable. Just today we went to a cg 3 hours from our home just to spend the weekend and it was a very windy day. So if your tow vehicle is equipped to handle whatever fiver you have you will be fine. Don't be marginal.