For the ultimate in support, basically, it's about as solid as a piano, the Quik-Lok WS550 http://www.quiklok.com/catalog/?p=productsMore&iProduct=27&sName=WS-550 is the best thing I have ever used.

It folds up quickly, but not into the most convenient shape (a sort of big 'T') and weighs in at 18 lbs.. With solid support at all four corners, basically bounce is a thing of the past.

It's only major drawback is that the legs don't micro adjust, just 8 height adjustment points, so if you find yourself on an uneven surface, a certain amount of support (beer mats always work well!) might be needed under one or two of the legs to get any wobble out.