We ride the Delaware river near Bordentown NJ. Great riding in the am on weekends before the other boats/jetskis come out. You can put in on the PA side, there is a new ramp just north of Bristol near Pennsbury Manor off route 13. Should only be 1/2 hour from Philly.
You can check out my facebook page.....just search "central jersey wake riders"
Or feel free to send me a private message here.