GPS question

[Jigger]

With the lakes at an all time low around here, I'd like to buy a hand held GPS and mark some out-of-water stump beds, rock piles, brush piles humps, concrete foundations, etc. that bass will hang around when the water rises. I already have depth finders on the console and the trolling motor. I do not want GPS capability on them. I want a very simple handheld unit.

I know absolutely nothing about GPS.

Here are some questions:

1. Is GPS accurate enough to mark the location of a rock pile, say, 8'x10' so that I can get back to it and fish it?

2. If the answer to question one is yes, would it show me when I'm, say, 50 ft. from the rock pile so I could cast to it without spooking the fish or would I have to get right over the rock pile and drop a marker buoy on it? Or something else? As you can see, I know nothing.

3. How would I go about marking this type of structure? Would I have to get out of my boat and go stand on it or could I stay in my boat and mark an object 50 or a hundred yards away?

4. Do you think a GPS would accomplish what I'm wanting to do?

5. Can you recommend a simple to use unit? I don't get along well with technology. I want to keep it as simple as possible. No bells and whistles. I only want to mark or record, or whatever the word is, objects that are now out of the water that will hopefully be underwater when the Spring rains come.

Thanks