Army War College in Carlisle, PA.

We aren't military but their space is exquisite with on site catering, full bat service, lovely grounds for outside ceremony, etc. And affordable as weddings go (rental, catering and open bar for 200 people was 20k)

Downsides: all guests must be accounted for on your guest list, thorough check before getting on base, and you can't bring your own alcohol on base. The rules are thorough but it was an amazing location.

Feed your photographer, video Grapher, and DJ's and you'll have a great time.