Whatever you get, be aware that you do not have to purchase topo maps. You can get maps at
http://www.gpsfiledepot.com/index.php. I got the SE topo map, it's awesome! I can only put a little bit of it on my vista but at least in only takes minutes. I can put it all on my astros
I subscribed to the garmin sat image thing, forget what it's called, found it useless. Plus I can use my phone for sat images. It's just a bunch of treetops.
Learn to use your gps before you need to use it. It's only a tool. I still carry a compass, mostly to check the electronic compass on the gps. If that is off then everything you look at will be off.
Because I live where it's flat and swampy, there aren't any real landmarks to utilize my mad orienteering skillz
but the compass still comes in handy when I'm in the deep dark brush and disoriented. Mostly to check the gps.
Always carry spare batteries. Make sure something bright is on the GPS in case you drop it. I don't know why they insist on making them and the cases black or green.
Back to the features - the little book will only tell you how they work, not when you should use them. There is a gps strategy to develop. I always clear my track log before I set out. I always waypoint my entry point, atv, truck, and/or various other points along the way. Make sure your compass is calibrated, otherwise it will be off. If it shifts when you start moving that is a clue because the electronic compass switches off after movement and it uses satellites to determine north and stuff.
Sometimes it's better to navigate by "goto" or instead of backtracking. Especially when you've trampled all around in an overgrown area. Your tracks will look like spaghetti, and you don't really need to follow the exact same track you went in, on the way out. It's very dense and overgrown where I am apt to go. The vines and briars are ethereal, you can literally have your clothes torn off your body. I have frequently "fallen" and hung there like a puppet because of the vines. I carry a small pair of pruners to help in getting detangled.
In cases like this you only need to find a clear path in the general direction you need to go in. Trying to pick out the exact footsteps isn't necessary.
Don't forget to save your tracks after you get back, or whenever you need to save them. It sucks to forget to clear the tracklog if you are using your gps to log miles, or whatever, then have superfluous miles on a track, when all you need is that little track.
Learning to use handheld GPS's have changed my outdoor life! I used to run my beagles and sometimes they won't come back, or for whatever reason you have to see what they are doing. I am usually the only one willing to go into thick dark underbrush, at night, because I have the tools to do it and not get lost (I also carry a powerful headlamp or two, and spare batteries). I can follow a blood trail at night and recover a deer because I can determine where I've looked and where I need to go. Everyone I know that navigates with their "awesome sense of direction" either gets lost, or doesn't go.
Of course this isn't the wild west, it's eastern swampy brush. Getting lost is an inconvenience and embarrassment but probably not death.
I have some videos of me going through the brush but I'm not brave enough to post them today. Plus, if you stick your head in a bucket of lettuce, with some thorns thrown in, you get the idea. I do have these cool maps I've made. I take my tracks and data I've saved on my gps, and go to
http://www.gpsvisualizer.com/ and make a "map" This is pretty cool when you want a friend to find your stand, or to map an area.
Just a couple examples. They are mostly useful for groups that hunt in the same area, so everyone knows where everything is. The straight lines are from where I stopped the track log, then started it again. It connected them with a line.
That's why I save and clear now, so I have nice pretty maps. I made those on a garmin vista, which only held 10 or 20 tracks, my new ones hold 200!
You can save all this data on your computer and name them. That way you can load them onto other units, view the data on that link I posted, or just clear your unit to make room for more waypoints.
Somewhere in those maps are where I got these guys!!
That place was overrun with pigs!
It was a swampy lowcountry wetland paradise
first pig!!!! It was hot humid and rainy that day. Got it at dusk and had to drag it out at night.
view from a stand
It's hot as heck here. It was over 102 this day with lots of humidity. One of our group got sick.
So get that gps and practice with it. They can contribute to the fun you have in the outdoors.