Bags work best for me because I can lift one without hurting myself, place 3 bags in my garden cart and distribute them to each bed, then cut and dump each bag. I can also gauge how much work I will do by counting the bags ahead of time and limiting my work to just those bags for one day.
I re-use the empty bags as mini-composters. Fill each bag with weeds and clippings, add a handful of soil and lime, water, punch a few holes in the bottom of the bag, close the bag (clip clothes pins) and set in the sun until it's cooked.
Only used the bulk once; it was less expensive but it was a bit too much work for one person (me) to move it out of the driveway.
