Unless you get a light trailer hauled by a fuel efficient vehicle you are not going to get great mpg for what you want...
I don't think you can get anything that will remotely come close to 30MPG and still have the space you want with 2 canoes on top and nearly a ton of cargo in it... Shrimpy 4-seater wagons appear to be too small for you and any SUV or minivan or large wagon like a Volvo V70 with 2 canoes on top will be a gaz guzzler compared to a Prius V or diesel Jetta.
Pull-Up Strap Handle Kit
Overstock Outlet Foods
Paddler's Truck Rack
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