If you have a car there are a few options, none too close. I think the closest range heading East would be the Islip Outddoor range. On the same road as (Freeman Ave, Islip) as the Long Island Shooting Center. It's a 50 yard range and has been busy lately since Huntington closed. Going further east you have the Brookhaven Outdoor Range (very nice, 200 yard rifle, sporting clays, skeet/trap and archery), a very nice range. Than there is Calverton, a nice informal range but a good drive (at least an hour) from you. The only range that I think will rent guns is the Long Island Shooting Center and think that is limited to .22 rifles and maybe a Camp Carbine if they still have them. BTW, I don't know about storage in the University but there is no problem bringing a rifle thru NYC (unloaded in the trunk). Remember you can always drive through if you a legal from where you start and legal at your destination but only in the unloaded and locked condition. There are no permits or purchasing restrictions for rifles and shotguns in Nassau County, only for handgun. I shoot at Islip Outdoor pretty much weekly (sat or sun), if you want to check it out send me a PM. Will be glad to show you around. Bill