Hey, MargaritaMan definitely bring your kayak down to Naci! 
I'm the kayak guy from BnT.  I have a Hobie Mirage Outback
that uses pedal power.  I can show you you some of the things
I've rigged up on my 'yak (depthfinder, small livewell, etc.) 
If you don't want to rig up a livewell you can always drag a
fish basket around (I carry one on board in case I catch a
fish that's too big for my well)...but DRAG is the key word
here.  You really get a workout if you have to pull that thing
around all day.  Since you have a tandem, you probably have
room to put a cooler in there somewhere.

P.S.  I think BnT's philosophy of "human-powered"
-vs- strict tube/kickboat rules will allow them to really grow
once the word gets out.

the godfather