Welcome as well!
There are tons of builds here that should answer the water pump questions, although when I search, I get so many responses it's hard to sift through sometimes.
As far as kayaks and bikes go...you're speaking my language, here's mine: (removable beds as well)
http://www.tnttt.com/viewtopic.php?f=42&t=48345Another kayak/bike purpose build discussion:
http://www.tnttt.com/viewtopic.php?f=42&t=55057For Alabama? summer, add a window A/C unit:
http://www.tnttt.com/viewtopic.php?f=42&t=60348Here's another toy-hauler related build I kept up with (kayaks):
http://www.tnttt.com/viewtopic.php?f=42&t=56252This is Gonefishin's build, more for camping/fishing, but a real favorite:
http://www.tnttt.com/viewtopic.php?t=33924And if you really want to go off the deep end, and take your kayaks: Gadgetman!
http://www.tnttt.com/viewtopic.php?f=42&t=45992&p=971571&hilit=kayak#p971571This ought to get you into enough trouble for starters, welcome to the club...