JhnR of the Little Guy Forums used a cement mixing tub for his "Sylvain Shoe Hack"
Sylvain screwed two 58 inch aluminum U bars (channels) underneath his trailer that hold two 30 liter Sterlite bins for shoes, tools, cleaning cloths, etc. There is a bin inserted under each side of the trailer while at camp and removed during transit. He used self drilling screws to screw the 1x1 1/8 inch and 1/8 inch thick channels into the underside of his Little Guy Silver Shadow. The channels can be found at various hardware stores or ordered from Online Metals.