Hillbilly I used a Garmin up in the panhandle and it was pretty much useless when the hogs would bay in some of those small canyons.Luckily the hogs up there arent dogged alot so they dont run very far.
I second that Tnhillbilly.
I love my Garmin but loose my dogs regularly on it in flat country. Every time they bay in a creek, divot, ditch, or get over the smallest of hills I loose them. Southeast Texas would be considered flat as a pancake by the hillbillies Im kin too.
I've had them get up to over 5,6, and 7 miles away in flat country and still get them with my long range antenna as long as they dont bay in a hole.