Only 0.5 miles away from the Wedding Venue. Highly recommend driving through or doing some hikes while you're in town. Check out the link below for information about the park, if you do want to visit you'll need to get a timed entry ticket which is also through the below link. Please ensure it's for the right date and time!

Plan Your Visit - Rocky Mountain National Park (U.S. National Park Service) (nps.gov)

Visit the infamous Stanley Hotel which inspired the movie the Shining. They have ghost tours and you could also stay here for the wedding:

Historic Stanley Hotel Accommodations

Go bar hopping around Estes Park!

11 Best Bars in Estes Park, CO (milehighhappyhour.com)