i am thinking about purchasing a mavic 3 classic for use along the reading and northern railroad for those who dont know i that is a very mountainous area i am worried about flying the drone in areas with very weak or no reception will it record video most importaintly, will it return to me?

I live in the Colorado mountains.  My previous drone, and Autel X-Star had not signal issues.  My current drone, a mini 4K has so far not had any issues.  If you're in very tall and narrow valleys or canyons the GPS signal can become weak.