Small wedding venue?

Me and my fiance are looking for a small, inexpensive wedding venue. We want to do it outside if possible, around some trees. We will have 30 people max, and need the space for the ceremony and reception. We're having difficulty finding a venue that isn't ridiculously expensive, so something relatively affordable would be ideal.

Oh, and it needs to be LGBT friendly. Apparently that's an issue here with some hosts.

Edit: We were thinking of doing it in the fall, October, maybe November at the latest. These are all very great suggestions so far!