Transport from the Airport
From the Denver International Airport the RTD Skyride (AB1 or AB2) can be taken directly from the Airport to Boulder.
The AB1 runs more often, but requires a transfer to the HOP (runs every 12 minutes) at the Broadway-Euclid bus stop (or other transport). Get off the HOP at Canyon - 28th St.
The AB2 has a stop right by the hotels (Canyon - 28th St), but only runs in morning or evening ours. In either case, tickets can be purchased for $10 on the RTD app.
Transport During the Conference
The HOP (local bus) sells day passes for $5.50. This runs every 12 minutes from the hotel, to the CU Engineering Center, to several local restaurant centers (28th Street Mall, the Hill, Pearl Street).
Suggested Hotels (CU Rates)
Embassy Suites by Hilton Boulder
Other options, possibly lower cost, include Airbnb (https://www.airbnb.com/s/Boulder--Colorado--United-States)
and VRBO (https://www.vrbo.com/search?destination=Boulder%2C%20Colorado%2C%20United%20States%20of%20America).