Those frequencies are ancient and aren't really in use to the best of my knowledge. If you look at the special conditions (visible in the license data itself, not within TAFL), 151.88 is valid for "roving area construction across all prairie provinces" but I've never heard them on there; and 153.05's special conditions say "see appendix B1 for approved frequencies and conditions", which is just the Basic Ten document (153.05 being one of the Basic Ten).
Carmacks was on one of the LTR trunks up until a year or two ago to my recollection but I haven't really been listening for them lately. There has been some discussion/chatter that they may simply be using cellphones or a PTT service. Haven't heard them on any of the more modern DMR/NXDN systems myself.