There are plenty of places on the East Coast that are good for rappeling. The thing is that they also happen to be excellent for climbing. You will make a bunch of climbers really angry with you if you choose to rap down on them while they are climbing. The activities you seem to wish to engage in are viewed as unsafe and/or disrespectful by most members of this community.
Leave the rap gear at home. Come and enjoy the Gunks by foot. Better yet, hire a guide service
and enjoy the climbing. You'll likely do some rappeling as a result.