Clearly I have no idea what it is like to hunt in the bush.
There are situations where it would not work well but for 90% of situations hunters are easily within a quick drive to a phone if there is no home phone or cell phone.
Situations where I could see this being impractical would be mainly moose hunting in the far north, hunting from the Soo would not hurt that, hunting moose near Kapuskasing (where part of my family is from) is also no longer a problem, heck, the cell coverage runs 10 miles from the highway.
I can see it in most cases where the moose hunter would have no problem going for a rip after the moose is out of the bush to go call in to a toll free number about the animal harvested and probably brag a bit for their kill.
We had a mandatory check in system for wild turkeys for years followed by a phone in system that is currently in place, for the vast majority of the province this system would work very well and give some actual real time data as to the harvest numbers as nobody will claim they tagged an animal during the season when they have not, something that can happen with the current harvest survey at the end of the year.