Hey,
I lived in College Station for the last four and a half years or so, but just moved up to connecticut. I got my first metal detector there and got into the hobby. I usually hunted the field at A&M where they have the bonfire memorial. Tons of clad, not much else although I'm convinced there are aggie rings in that field which are worth a bundle. It's in no way hunted out, don't worry! that field is huge. Other than that, I would mostly hunt the parks. Never found any old coins down there, in CS you really have to be in just the right spot since so much of it is new development. Go to the bryan college station list of parks page, you can google it, and they have the date at which every park was acquired.
The two oldest places I know of: The historic district that's right off george bush. There's a park there, can't remember the name, but it's surrounded by old homes, and one of the low lying areas used to be a pond. Never found anything old there but once again I was just starting, so who knows what's there.
The oldest park in town is in Bryan near the railroad tracks in a pretty poor area. Never got out there, it's way on the north side of town. If you find anything old in CS let me know!
Wolf pen might be a great place for newer items. I found a guys wedding band once (he was there looking for it already and I happened to show up with my detector), I also found a 1950s wheat penny and a bunch of clad. In CS, since a lot of places aren't very old, I would focus on where lots of people get together. Also, I would hunt the campus, I didn't do that as much as I would've liked, and there's a lot of old buildings there. You just gotta get out when there aren't a lot of people around.
Good luck!
-Rick