There are actually two places referred to as 'the farm.' One is east of town and owned by Trek, and it is very difficult to get permission to ride there. The other is west of town and is a farm owned by Greg. He is pretty casual about who rides there, you sound like you would qualify, but historically he hasn't wanted directions posted online. I'll PM him to check this thread and hopefully he'll get in touch with you: I would tell you but I'm not sure where he likes folks to park and enter. Otherwise there are usually some group rides out there once the season gets going, keep an eye out for that.