So I dropped all my dough on a bike already but if anyone is starting up a project anytime soon I just found a really neat long tail kit you can add to your bike which would give flare and a hell of alot more room for a person or cargo. This link should take you there
http://biketrailershop.com/catalog/product_info.php?cPath=38&products_id=132&osCsid=e1efe38d44cddbd0cd38ea551a16b073
looks nifty and if no one tries it now I sure will on my next bike ^_^

Ride slow

SpookyTooth blog offers free plans for that very same thing. Also free plans for a bamboo trailer. Blog under "Bicycle Technology from the rest of the world" Check it out