I think you are on to something with the cycle bottle idea. There are some nice spun aluminium bottles, that fit into a cycle cage bracket, that would look good under the bonnet.
Get the bracket in ali too, and if you run a remote motor, all you would need is to drill the screw on cap.
I am thinking of doing this myself...
(However - you can't carry alot of water though...)
Edited by - Felixgogo on 28 Jun 2011 11:57:17