I have the same problem. Our 8 acre farmette is beautiful, but it gets boring real quick. And I don't dare ride along the road because people are jerks and drive by at 60 miles an hour. So I'm stuck in the backyard. That's mostly why I hardly ever ride. There's nowhere to go.
Maybe get some buddies together and plan trail rides? Someone else could drive. That's what I'd be doing if I had a trailer.