For that trailer, just make an axle big enough to span the whole cooler and attach it to the bottome with conduit clamps.
If you are looking for ways to attach it to the bike, check out the home made trailer secion at http://www.bikeforums.net and you will find tons of ideas.
There may even be a trailer thread here.
If you are looking for ways to attach it to the bike, check out the home made trailer secion at http://www.bikeforums.net and you will find tons of ideas.
There may even be a trailer thread here.