We are flying into Denver Fri July 19 and staying one night, then heading to Breck the rest of the week. We are staying at Hyatt Place by Tech Center. It says we are only 3 blocks from rail stop that heads into downtown. Would that be the best method to use vs. rental car and parking downtown? Also, which day pass would be best? Express, local or regional? Can't see on their website if kids are free, or discounted. We will have 3 and 7 year old. Any suggestions on the rail/bus system from where we are staying would be great. Thanks.