I use the mommy hook on a double bob. Not too big for me.

It depends on the stroller. I had a mommy hook - got it for much cheaper at Home Depot (not the same brand but worked). Just be careful not to store too much or the stroller can tip.

Is that enormous "mommy hook" the best option? Or two or more smaller hooks? Closed or open? What do you use?

Pushing a double stroller and there's not enough storage underneath for all the kids' gear, especially with winter coming.