hope I'm not repeating myself here, but my one concern with straps is that if stuff held on a rack with straps shift, the tension of the strap will go away, possibly allowing more shifting-hence more looseness in the strap. At this point, the strap could then end up becoming loose enough and dangle down into the wheel. If there is a hook involved, that could end up in the wheel, or the cinching "ends" of the straps.

I can see the advantages of both straps and bungees, and can see the advantage of having a one single large bag like Doug uses to keep all the various doo-dads in one contained unit, so less chance of stuff shifting and or becoming loose.

Again, my personal experience has been only bungeeing a tent to the rear rack, and I'm not doing long trips where bungee stretching and all that would come into play over time.