Here is my list of on-site freqs from last year. I will be at the show this week, and reverify my list.
CONVENTIONAL
Security + Police - 452.6875R
NWSS Command Center - 464.875R
Volunteers. - 451.5625R
Parking Lots. - 463.6875R
Shuttle Bus. - 452.0625R
Maintenance. - 461.625R
Livestock - 452.425 simplex
The R suffix above indicates the frequencies use a low-power repeater, with a range of about 1-2 miles or so.
Facility operations are on the Denver P25 trunk system linked above. This system can be received all over the metro area.