I got into a conversation with the farmer that I have a subscription with about putting bikes or trikes to use on his farm. I know that any mountain bike might do well, but the few times I've ridden my Xtra or hauled a trailer behind a bike on muddy unimproved trails, I tend to bog down quickly.

Have you seen bikes or trikes in use for hauling boxes of veggies on farms? Should one be avoiding small 20" wheeled trailers, or are cargo trikes more effective on unimproved roads?