There are several restaurants on Orient that have good wifi speeds if you are eating / drinking there. I know the speeds at Palm Beach are good and they have a protected area where you could call or skype a conference. If you drive into Phillipsburg you have the Greenhouse, Holland House and 12 Metre Bar, all with good connections. On Oyster Pond you could hang out at the Dingy Dock and make a call as they usually are quiet prior to Happy Hour and have a decent connection.

Just some thoughts.