A license can be purchased online or on the phone if you don't want to wait in line. Sometimes the computers go down , too.
http://www.dec.ny.gov/permits/6091.htmlThe compactor has some tough wading where the fishing is good . Pineville Bridge is a little friendlier to your girlfriend wading. Same for the north side of the river below the 52 bridge in Altmar. A few hundred yds. down is the area called the barrel. All these areas will be CROWDED. Grin and bear it. Go EARLY! Don't be fooled by the snaggers, watch and you'll see people actually fish, they usually are good about answering questions, as they are the real deal.
I've done well with steel on sucker spawn and a few salmon to boot. Light blue, pink and a lime/chartreuse have been the best colors for me. Sz. 6 with a beadhead for salmon and early steel. Black or brown wooly buggers also are good. 4 thru 8's. Any other advice you got from the veterans was golden. Have a great trip!
PS- put your girlfriend above you, you can get her a little longer drift and you can time yours with hers and maybe avoid some tangles with others.