County Line Landowner's Coalition
countylinecoalition.com/index.html
This coalition includes part of Cortland County, and also has a list of other coalitions. Your best bet would be to contact them. (Our property is within their area too!)
I would always suggest signing a lease with your coalition. These coalitions should have well educated lawyers representing them (County Line's Lawyer is very good). Most coalitions have developed a 30-40 page lease compared to a 3-10 page lease presented to you by a gas man. The coalition's lease is going to protect your property, protect your rights, and make sure the gas company plays fair.
Gas companies are notorious for hiding things in legal terms and fine print, or leaving things out on purpose to take advantage of the landowners.
Basically if you sign the lease presented to you by the gas company without making major changes they are going to walk all over you.