If they're working for the 911 system, they will be on the AHS part of the AFRRCS trunk system, which is mostly encrypted in terms of ambulance operations. There are a few channels which are in the clear, but they're used mainly for interoperability for working between Fire & EMS, Police & EMS, etc.
I did look in the federal license data for Associated Ambulance, but nothing came up - that means either they're not licensed under that name, or they are and have masked their data from public view.
Hinton is in the AHS North Zone, so look for "AHS - North Communication Centre Talkgroups" on
this page. Be aware that AHS NCC covers a gigantic part of the province from about Jasper all the way around to Cold Lake and everything north of that, so those channels may carry traffic that's way far away from Hinton at any given moment.