In April 2016, we embarked on an early RV trip to go fairly far up north to Flat Head Lake in Montana, because we got a good deal for 1 week at a very nice timeshare at Bigfork Harbor. Then, we got another week in a resort in Vail, Colorado, where we also parked the RV to stay there.
Thanks to my lucky star, the weather was cool but very nice and sunny during the two 1-week stays at the resorts. However, in between the resort stays and at the end of the trip, it was snowy and wet, and we spent a few days huddled inside the motorhome watching snow fall. Road condition was of course hazardous, and I did not want to take any chances with the motorhome.
We had planned to go for 6 weeks, but at the end, decided not to push our luck and turn home after 4 weeks.
You pay your money and you take your chance at that time of year.