Personally, I don't like the idea of vehicle use during a water war game expect, perhaps, to be used to assist with transporting equipment (not for carrying people and definitely nothing motorized). Use of a vehicle to get to a game location before a game starts is not in the scope of this limitation, but use of a vehicle to get around a game area during gameplay takes some of the fun and challenge away, IMO. Don't get me started on the problem of having a mostly non-destructible mobile platform on a battlefield, either.
Anything motorized would be a no for me and anything that allows movement faster than a typical person can run is also a no (i.e. no bicycles or similar vehicles that use gears). I suppose the only vehicle combat I could see myself doing would be having some sort of canoe/paddle-boat naval wars or using things like wheelbarrows and wagons to pull portable refill stations around.
In the end, I'm still of the belief that water wars are best played primarily on foot.
What about you? What are your thoughts on the use of vehicles during a water war?
