mmm, end of March, beginning of April....could still be dicey in Denver at that time of year....heck, the coldest i've ever been was driving from Albuquerque to Phoenix in April....38 degrees, but 50 plus mile per hour head winds and fighting to keep up to highway speeds (my bike can do 90 mph, but I could only go about 60 mph at WOT into that wind.) I nearly froze to death before hitting Arizona and dropping elevation from 7k down to 2k. It didn't help that I thought, oh its April, no biggie....and only had my spring/fall gloves. Winter gloves would have helped immensely...I had to stop every hour to get some hot tea or chocolate and get feeling back into my deep purple hands.
So...if Brammo is there I would likely plan on scootering, but have the car ready as a back up.
Gavin