I've sometimes had small buds that were going to be a pain to hang, or just ran out of room to hang in my "spot" and I got some of those sturdy, glossy plastic picnic plates to lay them out on. If you have slightly moving, relatively dry air, and can turn them daily, they will dry just fine. Mine always come out just fine. As for the paper bag thing, I'm not sure, but I always thought I would lose some of those nice sticky trichomes to the bag. Curing in the bag may be another story.
i have done both hanging and paper bag saw no differnce but paper bag is way easier so i use that turn/ shake around daily then i cure then for at least 1month somethimes 2