Anyone, 18yoa or older can transport an unloaded handgun to or from the range (and a few other places). There is no need for a license to carry, hunting license, etc. Remember, lacking the LTC it must be UNLOADED.
A LTC "allows" the person to carry concealed on or about his person or in a vehicle. Concealed carry is NOT required.
A Sportsman's Permit allows any person 18yoa or older to carry a handgun concealed while hunting, fishing, trapping, going to or coming from those places. A SP is NOT a concealed carry license in that you cannot use it to carry while running down to the local 7-11, Wal-Mart, etc. It is only good for the reasons listed above.
The law on carrying concealed or in a vehicle;
§ 6106. Firearms not to be carried without a license.
(a) Offense defined.--
(1) Except as provided in paragraph (2), any person who
carries a firearm in any vehicle or any person who carries a
firearm concealed on or about his person, except in his place
of abode or fixed place of business, without a valid and
lawfully issued license under this chapter commits a felony
of the third degree.
One of the exceptions in which a LTC is NOT needed to transport an unloaded firearm (handgun) to the range;
(b) Exceptions.--The provisions of subsection (a) shall not
apply to:
(4) Any persons engaged in target shooting with a
firearm, if such persons are at or are going to or from their
places of assembly or target practice and if, while going to
or from their places of assembly or target practice, the
firearm is not loaded.
The definition of loaded;
"§ 6102. Definitions.
"Loaded." A firearm is loaded if the firing chamber, the
nondetachable magazine or, in the case of a revolver, any of the
chambers of the cylinder contain ammunition capable of being
fired. In the case of a firearm which utilizes a detachable
magazine, the term shall mean a magazine suitable for use in
said firearm which magazine contains such ammunition and has
been inserted in the firearm or is in the same container or,
where the container has multiple compartments, the same
compartment thereof as the firearm.
Tell your gunshop owner he doesn't know what he is talking about.