Yeah don't even bother -- at $4.00 a gallon any savings you have with be vaporized by the fuel bill. Then on top of it ... you get to drive through NY.
You'd be better off finding somewhere in state ( I can't believe I just said that ), or just going for broke with a TT load. If I could afford it I would have got a TT load ... but then you need a way to unload it. I'm starting to change my thinking on the bags .... Getting awfully expensive for the convenience.
If your still set on bags, this place I found to be the cheapest around here: http://www.squierlumber.com/pages/stock_status.cfm
It's a bit of a drive, but nowhere near the drive to PA ... and the damn tolls you'll pay to that other communist enclave next to CT, just for crossing that sewer they call the Hudson ...