I was able to use a wheel
barrow wheel to get the Bucket Hauler going today.
The driveway still has deep
and uneven ruts, which has me re-thinking the trailer concept.
Maybe there's a way to carry
6 buckets on the ATV without the trailer trouble?
This would be a much better, heavy duty alternative-
http://www.harborfreight.com/870-lb-capacity-40-inch-x-49-inch-heavy-duty-utility-trailer-with-8-inch-wheels-and-tires-42708.html
This has real leaf springs and wheel bearings.
You could certainly build a pair of crates (to be fitted to the carrying racks) that could each hold three buckets snugly. But check the load limits of those racks first!
Stability is an issue as well. If the ATV could tip over the driver would be in a crappy situation.
Whether you want to drive with three buckets of manure right under your nose I leave to you.