If you’re willing to go the used/ebay route the Garmin GPS 12 is all you really need.

More waypoints than you will ever need, tracking function and good battery life.

Spare batteries are a must as is a back up compass.

The issue wrt to being able to receive a signal in cover is a function of cover interfering with signal reception and satellite coverage. If you’ve got good satellite coverage you can get a signal through pretty heavy cover, but if the satellite coverage is poor the ability to receive a signal is impaired.

Just a general comment on using GPS, I’ve always treated the unit as back up even though I’ll use it as a primary means of wayfinding. Knowing which direction the trailhead is mandatory. Batteries dying and lack of coverage follow Murphy’s law.