Can't get any easier than webbing and cinch buckles. And honestly the weight difference from whoopies isn't all that much. I count ounces and still rely on cinch buckles. Also I have the newer version of Warbonnet's cinch buckles which don't require the backup knot.
As far as clips go, they do the same thing as biners, just lighter weight! (and just as easy) Bottom line for that, if you have biners, just use those. If you have some extra cash and want to experiment, get some clips!
For tarps... get some Dutch Flyz!!