Depends how easy and how much you want to spend, somelike an Garmin Etrex is cheap and will get you to where you want to be, the downside been you'll have to work out which way to steer to get the lat and long to go the right direction.
Alternatively you could buy a plotter, you can put your cursor on the wreck, click go to cursor and away you go, it'll cost more than a simple hand help GPS though.
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