Best for people who are looking to only stay for wedding events and be central to the venue. Look for AirBnBs or hotels in Idaho Springs. You should have less than a 5 minute drive to the venue.
Golden, CO is the place for anyone staying a few extra days. There are a ton of things to do, and it's one of our favorite places in the area :) The Golden Hotel is right in downtown and an amazing place to stay.
This will be a further drive to the wedding, but if you are interested in checking out some tourist spots you'll want to look at lodging in Denver, Arvada, or Lakewood (depending on what activities you have in mind).