Aha! Thanks for the links, especially the second one. Very informative.

Looks like the maps for my area are an additional $108 from Amazon. Not too bad, considering I was thinking GPS + maps would run upwards of $400 or so. I'll do some looking around to see if I can find it cheaper anywhere.
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"Stand in the ways and see, and ask for the old paths, where the good way is, and walk in it; then you will find rest for your souls."