There are limited options in Windsor but there are a multitude of options in both Fort Collins and Loveland at various price points.
Utilize this link for discounted rates at all nearby hotels: https://zola.hotelplanner.com/184412401/EventPage6521028
I would recommend any of the following hotels:
Candlewood Suites Loveland
AmericInn by Wyndham Windsor/Fort Collins
Holiday Inn Express and Suites Loveland
Embassy Suites by Hilton Loveland Conference Center
You must book online through these links in order to access the group rates.