I think a consensus is forming that Hadloka wood must be glatt (800 grit minimum) and hiddur mitzvah is zoch wood, i.e. real lumber (no particle board that has glue and other fillers). Mehadrin min hamehadrin is (for example) old growth, eye of the redwood, only using the dense center of each log. The rest of the wood you can use to burn the Chometz or even bake matzah. Just not for the bonfire. Needless to say, Hadloka wood should be chopped by a chassidishe lumberjack.
