I was thinking of sending a family member a scanner with some main frequencies. I see LOTS of listings but don't know which ones are active for RM Natl Park area. Of interest would be the visiting fire fighters, Estes EMS, active YMCA OTR (shows 14)
The listings for Rocky Mountain National Park should be pretty darn accurate, check the "Federal" menu for Colorado and go the Rocky Mountain Park listing. The park itself uses analog VHF, except they have 1 simplex P25 channel for ranger tac, which is clearly included in the listing. Of course Estes Park PD and Larimer County SO are ENC, but Estes Park/Larimer County fire and EMS can be monitored, assuming your family member has a scanner that decodes trunked systems. Also I believe the Cameron Peak fire may be still going on, if so there is a recent thread on here for active frequencies/DTR Talkgroups used for the Cameron Peak Fire.