Aeriel images on GPS

Is there a way to get aeriel images on a gps in good resolution? I have the Garmin Oregon 600 and also the Rino 530. I was hoping to have something similar to what ONXmaps displays on you mobile device. I know Garmin offers the birdseye but its a subscription and the research I've done says the resolution is just ok. There are a few youtube videos but they all seem kind of vague and you need multiple programs for conversions. Yes I know I can use the gps on my phone but trying to avoid multiple devices on my backcountry hunt. Anyone have success doing this or am I SOL. Thanks

The type of display used on the Garmin, excepting the Montera, is such that the imagery will never be as crisp as on your phone, regardless of the imagery's actual resolution.
Sending imagery to your gps can be done with topofusion or there may be other programs I'm not aware of. If that imagery file exceeds the tile limit of the gps (500 tiles on 600 series units) you'll need to hack the bios to open up the birdseye folder so you can drop user created maps in there (50,000 tile limit).