I wouldn't worry about being compact if it's a back up and finding your dogs depends on it. Yes Tracker is compact, but i've had to pull out the old faithful Quick Track and come find many dogs for people that Tracker couldn't pick up. Pull out the big "tv antenna" so you can reach out and find them. You can always leave it in the truck, or strapped to the 4-wheeler... but it's there when you need it. Don't sacrifice comfort for your dogs lives.
And at the rate people are selling their systems to get a Garmin... you should be able to find a helluva deal on one.
