Thanks everyone. KJ, for the tarp material I used tulle. I purchased it at Michaels. Here's a link:http://www.michaels.com/celebrate-it-occasions-tulle-fabric/M10249540.html?dwvar_M10249540_color=Lavender#q=tulle&start=1
Angelo I used cat litter for the gravel and no false bottom. After the pics I emptied the trailer. I might make a false bottom for a permanent display.