Scott -
I'm have a slip behind the house on a deep water canal so I've never delt with marina slips. I haven't seen many mooring fields around here, with the exception of Yorktown. They have some dockage available at Yorktown, but not too much and then they have a few moorring balls out as well for the festivals. A number of us used the moorings one night, they are in the York river which is deep (70+ ft I think) and can get some big waves rolling through there, but it was nice and calm that night.
From what I've gathered, it seems that the moorings are pretty common further north of us, especially in New England area. I think part of this may have to do with the extreme tides they get up there.
I agree you gotta keep the boat somewhere, problem with keeping the boat further away is how often you will get out to it. There may be evenings after work that you want to get in a sunset sail, but if the boat is far away, you might not be able to swing it. On the other hand, if you are going out to the boat every weekend and staying out there with nice facilities, it's like having a vacation every weekend :dance:. The closer it is, the more likely you are to go to the boat just to check on it or fix this or that when you have a little spare time... I'm sure I'm not telling you anything you haven't already considered though. Those nicer marinas probably have a "ship store" for parts and boat stuff that you always need, where the bargain place probably doesn't.
Cheers,
Jon