I have a truck which makes transpiring kayaks a piece of cake. We’ll drop off the kayaks by the starting point and then take two cars to savage (or where we want to get out), park the truck and take the other car back to the starting point. Because it’s Columbia I wouldn’t worry about anyone taking the kayaks in the 25 minutes it takes to drive around, but you can always hide them in a bush or under the bridge. I’ll clip my car keys into my water shorts so there’s no chance of me losing them on the way, because we have lost a backpack to the water before.