If a non-resident hunter is flying in and going immediately out to the middle of nowhere (i.e. Brooks Range, Rex Trail, etc.), is this type of quarantining an acceptable alternative to testing?

No, 14 day quarantine is not an option for non-residents. If the non-resident has tested within 72 hours of departure to Alaska and is awaiting results, they can travel to their final destination and self-quarantine until they receive their test results. They will need to be able to access wifi/cell service to receive their results while quarantining.