Yes! The Estes Park shuttle will bring you directly from Denver International Airport to the venue. The cost per person is approximately $95 round trip and it runs at a variety of times, seven days a week. Please visit https://www.estesparkshuttle.com/DIA-airport-shuttle for more information.
The weather in Colorado can be unpredictable.... Especially in September. I would recommend confirming your wardrobe choices closer to the date, to ensure that you are comfortable throughout your stay.
You will need make a reservation to visit the park. They currently have "timed entry" to minimize overcrowding, but hopefully that will not be in place by the time of the event. Please visit https://www.nps.gov/romo/planyourvisit/timed-entry-permit-system.htm for more information.
The Park has a variety of pass options available. They have yet to release the day/week passes, but they will go on sale May 1st Please visit https://www.nps.gov/romo/planyourvisit/permitsandreservations.htm for more information.
Estes Park isn't a large city, but you will have access to groceries and boutique clothing stores. If you are looking for a Target, you'll need to head back to Denver.
We would love it if everyone could stay longer. Ryan and I will be in the area for the entire week, so please make a longer vacation out of the event!