Josh & Brian,
Thanks. To keep from influencing the results, I'll hold off on giving my opinion just yet. I really only have strong confidence about tree #4. Traveling north of Syracuse, the only native hickories you're likely to encounter will be Bitternut and Shagbark, and even those species fade quickly once you get into the mountains. This is unfamiliar territory for me, and I value greatly your expertise. I'm excited to verify what these species are in a few months.
"There is nothing in the world to equal the forest as nature made it. The finest formal forest, the most magnificent artificially grown woods, cannot compare with the grandeur of primeval woodland." Bob Marshall, Recreational Limitations to Silviculture in the Adirondacks