Southernson13 this might help you. I know they did allow people to hunt on the Fort Indiantwon Gap complex but i don't know if that option is still available.
Good Luck! 
Fort Indiantown Gap Information Numbers
CONTACT INFORMATION
Range Operations Building 11-9
Phone 717-861-2152 or 2153 Call for all access/safety concerns
Fort Indiantown Gap Police Building 7-05
Phone 717-861-2727 All emergencies
Wildlife Office
Nick Hoffman Outdoor Recreation Manager Building#26-151  
Call 717-861-2663 or E Mail 
RA-MVORP@pa.gov Public Affairs Office Building 8-41 
Phone 717-861-8468
Fish and Game Conservation Club Building 13-4 
Phone _NA 
E Mail Facebook page 
Training Area Availability 
Phone 855-522-2068 
E Mail - 
ftig.isportsman.net Facebook Page: 
https://www.facebook.com/ftindiantowngap/