Selected info from the NRA site about PA gun laws;
~Transfers of all firearms (handguns, rifles and shotguns) by a licensed dealer are subject to an instant records check of the purchaser.
~It is unlawful for any licensee to sell, deliver or transfer any handgun, other than an antique firearm, to any person unless the transferee is provided or purchases a locking device for that firearm, or the design of the firearm incorporates a locking device.
~However, no license is required:
.... (4) to carry an unloaded and securely wrapped firearm from place of purchase to one’s home or place of business, to or from a place of repair, or in moving from one place of abode or business to another, or from one’s home to a vacation or recreational home or dwelling or back, to recover stolen property, or to a location to which the person has been directed to surrender firearms or back
upon return of the surrendered firearm;
~TRANSPORTATION IN A VEHICLE
A handgun being transported in a vehicle without a license to carry must be unloaded and must be carried under one of the exceptions listed above under ‘Carry.’ Rifles and shotguns may be transported in a vehicle as long as they are unloaded. While transporting a firearm without a license, it is up to the person carrying the firearm to demonstrate that one of the exceptions applies. A law enforcement officer may demand such evidence.
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Selected excerpts for NY:
~No permit is required for the purchase of a rifle or shotgun (except in New York City).
A license to carry or posses a pistol or revolver is required to purchase a handgun.
~A license to possess a handgun serves also as a license to carry unless restricted.
A license to carry or possess a pistol or revolver, not otherwise limited as to place or time of possession, shall be effective throughout the state, except that the license shall not be valid within the city of New York unless a special permit granting validity is issued by the police commissioner of that city.
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So as far as I can tell, you will be subject to a background check at the show.
They will do it by phone.
PA law allows you to transport your purchase across the state, as long as you get it from point A to point B in short order.
NY law also allows you to carry/transport a gun if you are properly licensed.
Except for NYC.
Then you register it, if a hand gun. Rifles and shotguns don't have to be registered, according to state law, though some local municiplites/counties do have further restrictions.
SO are you going to travel directly from PA to NY or are you travelling thru NJ?
Selected excerpt for NJ:
~...Identification Card (FID), however, no Permit to Carry or FID is required:
.....
2. To carry any firearm unloaded and contained in a closed and fastened case, gunbox, securely tied package, or locked in the trunk of the automobile in which it is being transported and the course of travel shall include only such deviations as are reasonably necessary under the circumstances from any place of purchase to his residence or place of business, between his dwelling and his place of business, from one place of business or residence and another when moving, or between his dwelling or place of business and place where such firearms are repaired, for the purpose of repair.