Paddling from Sidney, cross to Sidney Spit. It is often easier to carry kayaks over the spit than paddle all the way around it. From the northeast side of the spit, island hop to Forrest Is. and Rubly Is. over to Gooch Is. The more interesting side is the north side. Travel along this north side of Gooch to Rum Island. Look for the National Park sign.
On your crossings, watch for the wind, especially if it will be opposing current. It can get pretty choppy out there. Also watch our for Washington State Ferries passing through the channel.