I posted these photos right after returning from opening day of Halloween Time a few weeks ago, but since the question has come up about the bags people are using for their MHP candy, I will post again!
Basically, there are 2 main tote bags floating around DLR in the shops, and people are using these as trick or treat bags, since the free bags you get with your MHP admission are tiny and don't hold much.
This orange bag is everywhere, in almost every shop around Disneyland (and maybe DCA too?) - it has a cute design on the front, but in person it looks a little cheap. I think it's a bit more durable and sturdy than it appears, but I just don't really care for the kind of shiny material, which doesn't come across as well in photos. In any case, if you need a bigger bag to haul your candy around, it gets the job done!
And this is the bag I got (I prefer this bag because I like the colors better and it lights up and twinkles at night), which Jessica/Belle Ella also has. IF you see this bag in a shop and you like it,
grab it right on the spot!
Don't wait! This bag is more popular than the orange bag, I think, and it gets snapped up rather quickly. When I first looked around on 10/3, I didn't see this bag in any store but the orange bag was all over the place. All of a sudden, before the MHP began, the black & green bag reappeared in a couple of shops! There must have been a stash of the bags in the back somewhere.
Here it is in its twinkly form, at night:
People are also using Mickey pumpkin trick or treat buckets (not as much as the bags, though).
And here are other random photos taken 2 days ago, just for the heck of it (because I'm already in Photobucket!):
Little cutie (I love animals!)!:
One side of a pumpkin:
The other side of the same exact pumpkin: