Seems like a good plan.
Addressing your lack of cell service:
This vid will give you a little more on the Garmin Inreach. device.
Yes,First Responder tools and skills can keep someone alive for a time,but that time will run out.
IMO,if you are actually dealing with a life threatening situation ,such as a GSW, in a remote place with no cell service,
This device will communicate your location and emergency immediately.
Whether or not it is the answer for you? You decide.
Its good to know your options
https://youtu.be/TbsVRMdE3-Q