Any realtor that has been in the game for more than a few months will immediately spot you as a novice. You're much better off being forward and upfront with them.
I am not at all familiar with land in New York. Purchasing raw land is very similar whether you are in New York or New Mexico.
The important things to consider when purchasing raw land are:
access to the land perhaps the most important aspect. access along a publicly maintained blacktop road is best. access on a publicly maintained gravel road is acceptable. access on a shared road CAN be a nightmare.....find out who pays for road maintenance/snow plowing/culverts/etc well before you consider purchase
access along someone elses property in which no road currently exists .....or access is in some form of dispute......can easily lead to astronomical lawyer fees
proximity of utilities, how close are you to electrical service, natural gas, cable, telephone service Access to electrical service is VERY important, unless you are willing to stick $20000 into a photovoltaic system, or an expensive to operate generator.
soil types for septic systems. Conventional septic systems run $4 - $5000. Mound systems run $10,000 - $15,000. Conduct a perc test or its equivalent before your purchase, and make your offer contingent upon it meeting specs for a conventional septic system
Water depth. Always somewhat of a mystery. Ask the neighbors (not the realtor) how much it cost them for there wells. Not exact science, but it gives you a ballpark idea.
Zoning regulations. I'm of the belief that reasonable zoning regulations make certain your property will retain its value. This is a double edged sword. While it means you'll need building permits, it also means someone can't move into the adjoining property with a grubby $1000 trailer, 6 kids, 14 yapping mongrel dogs, and 23 junk cars.
It goes without saying that clear title to the property is a given. Quit claim deeds generally aren't worth the paper they're written on. A warranty deed should be the means of property conveyance.
Flat land is generally better than sloping land, especially in a northern climate. Sloping land makes things like driveways difficult, especially when one has to navigate them when they are snow covered and icy. Flat land can however, have its pitfalls. Poor drainage comes to mind.