If you want to be in Golden (the closest city to the wedding venue). This is also where the wedding eve gathering will be. It's close to walking, shops, restaurants, hiking, etc.
If you are looking for a cheaper option and/or want to be close to the wedding venue. This hotel is only 3 minutes away from Juniper Mountain House :)
There are also a ton of Airbnb options in and right outside of Golden. Getting an Uber should not be a problem!