Yes, there will be valet parking.
If you want to be close by to where the reception is happening, there are a number of hotels in Littleton and Highlands Ranch that are close by to the venue. A good area would be Lucent Boulevard in Highlands Ranch. We recommend spending a night in Downtown Denver if you want to explore Denver. We recommend staying in Cherry Creek, Wash Park, or Larimer Square. These are a bit further north from where the venue is, but is worth a visit for the day.