There is a web site for firearms owners in Pennsylvania, PAFAO. They have a forum, and most of the members are good people. I'd suggest logging on there and asking if anyone would allow you to drop your blaster at their house for a few days. To avoid making it an illegal interstate transfer, keep the gun in some kind of a case that locks, and you retain the key. If you have the key, the temporary host doesn't have ready access to the gun and no transfer has taken place.
Forum link:
http://forum.pafoa.org/