Just ordered a garmin gpsmap 62s on close out pricing as the new 64 series is on the way to stores. I'm going to pair it with the huntgps chip for colorado....never needed one of these in texas, just drove to the stand which was on a road or on a pipeline, lol. I used the gpsmap stuff on my offshore boat when we lived on the coast and if this hand held is even remotely related it should be a good piece.
If you're lucky enough to be on private land and can leave your stand up during the off season you can tie an old piece of cloth or something of the sort to your stand. I like to use an old camo bandana that I have. That way the deer get used to the movement and eventually don't bother even looking up when there is slight movement. This may just give you the time to draw your bow or raise your gun without being detected.