Umpqua kayak fishing, smallmouth

Hey everyone, the last few years I've been going down to the umpqua near Elkton/kellogg/Tyee and bank fishing/wading for smallies. I've done the end of June or early July.

I bought a new yak and a buddy of mine has one as well so I've been thinking about a one day trip. It seems like a good place to do it, relatively calm water, and nothing extremely shallow and unpassable.

Have any of you done that? I see plenty of drift boats. I wonder, where do they launch and take out? What do they do for shuttling? Their own vehicles or a service?
Because there are only two of us, we'd have to stash our boats for an hour or so while we go get the car at the launch, any place to safely leave them unattended?