Not just Serpents CP, don't forget ASCOT (A Silly Cardboard Operation on the Tay).
Fabricate then race a cardboard canoe down the Tully slalom site. Seem to remember a Neil Baxter design that was really a large cardboard envelope - ideal for all those letterbox slots that modern extreme paddlers do harp on about!
Helping injured people at events
Juggling 3 skittles would be a lot easier in a C1 - extra height before the skittles hit the water. I shall try it in a K1 on flat water first - until I've learnt how to paddle with them as well... Of course C2 would be a doddle with someone else to do all the paddling - would look great on youtube.