We ruled in our group that Quickdraw works for a variety of things - basically, as long as you're pulling out an item that would normally be a move-equivalent action, you're allowed to use Quickdraw to turn it into a free action.
We had a Wizard who had a Bag of Holding at his waist with 10 loaded Heavy Crossbows in it. Since all the bag HAS in it are crossbows, drawing one is a MEA. So, we ruled he can quickdraw the crossbow as a free action, move his movement, and fire it. We allow the same general function with wands, potions, and scrolls as well.
Basically, we've made quickdraw a bit more general to make it a little bit more like "Quick Pockets". As long as you don't have to root around in your backpack for the item you want (it's at your waist somewhere, whether in a belt for multiple wands, a potion belt, a scroll case at your waist, etc... you can get it out as a free action with Quickdraw.