I am of the opinion that any bike intended to haul any significant weight, should be equipped with a dual leg kickstand. I actually installed bar ends on my kickback stand to widen the foot print of the stand. My Xtracycle hasn't fallen over during loading or unloading yet. As always, YMMV.

Edit:
When I was looking for a cargo bike, the Kona Ute wasn't on my radar screen, I have been very happy with my X. Gotta luv serendipity.