One legal issue, if you have certain licences then this is not something you can do when you feel like it. You'll have to do it all the time. Modern systems record the data for you, and you transmit it the reporting agency.
What if you go hunting for a week, or vacation for couple, do you need a portable unit to keep up, to meet the legal requirements?
Be sure to check.
Note, I have a portable unit and have since I got my first machine! I don't camp or hunt anymore but where I live makes me subject to power outages. Included in my rig is the inverter, a 12v deep cycle wheelchair battery, the wiring, a quick charger and a 5,000 watt generator that will power plenty of other items but was bought, primarily, to run the charger. Obviously a much smaller genset would be fine, even a vehicle in a pinch! The wheelchair batt is common usage for driving a C-pap. I love this thing, I went for several years of not using C-pap when the power was down! Stress + no real sleep + my already sunny personality was a real bummer!