Why limit yourself to what you can carry on just the bike when for less
money (depending on your salvaging skills) than a Wal-mart basket
you can own and use a trailer that you can build for about $25??

"For those who want a "afforable" trailer consider a DIY trailer like this one. I built this trailer
many years ago using easily salvaged material that were found or I had on hand. I use it still
today when my Worksman PAV trike can't handle the load. If you elect to follow my mods to
the original plan it will have load capaicity of 300 lbs easy.

http://www.motherearthnews.com/Do-It...e-Trailer.aspx

My mods.....
Frame... from plywood to white oak salvaged from a shipping skid.
Wheels...from 27" to 20" salvaged from a discarded kids bike (carrys more).
Neck.. from plywood to white oak salvaged from a shipping skid.
Bracing for neck (for added twist strength) diagonal from front edge of frame to 6"
behind hitch of 3/4" electrical conduit. Neck dimensions can be adjusted to fit properly.
Paint...what I had on hand in oil based enamel.
Hitch.. a piece of tire side wall or other cord reinforced rubber sheeting.
Safety... seat belt for kids and bike flag for idiot drivers.

This plan is so easy to build I built mine using simple hand tools for everything except
drilling the 4 holes in the metal conduit."