embedded google maps

I need the assistance of one of you map- and/or geocaching-happy folks to help me. I'm back to working on the campground website and I registered for an API or something like that at google.maps and am trying to figure out how on earth it all works. Have any of you guys played around with that or something similar and can give me a hand?? I can email you the code if that'll help. I'm not very sophisticated in my HTML, though I'm better than I used to be.

Many thanks in advance!!