I took the DelMarVa shore route the last two trips, but from June 2014 here were the I-95/NJTP tolls:
NJ Turnpike from GW Bridge to Delaware Memorial Bridge - $13.85
Delaware memorial Bridge - $4.00
Delaware Newark Plaza - $4.00
Fort McHenry Tunnel - $4.00
If you have to avoid the GW Bridge due to traffic, the Henry Hudon Bridge is $5, the Tappan Zee is free westbound, the Garden State Parkway versus the NJTP is a wash, and I-287 is free which would reduce the NJTP tolls by about $4.75.
Hope this helps!!