Same thing I do for the exact same reason. I heart Denny.

I bet those paper grocery bags are getting a little hard to come by these days though?

Not in this neck of the woods.
The area I live in is about 5 years behind everywhere else.

Its not as hard as you think I know of about 3 places I shop you can get them to bag stuff in them. Then about three to four more places you can buy a bundle of 5 for around 2 bucks. If your like most of us home brewers though and your careful with them they can last for a few batches before they become kindling in charcoal chimney.

We have smaller paper bags for brewers to bag their grain in at the shop... can fit about 5 lb in a bag. I usually pour a bag in slowly, moving it back and forth, then stir and add the next til I'm done.

Anyone construct a hopper to dispense the grains? I'm thinking about that when I set up in my basement. Hang hopper from ceiling, slide open small door on bottom and stir as grain dumps into mash tun at desired rate.

When I worked at Blind Tiger in Topeka, KS they had the mill in the attic, then everything went down a chute to the mash tun on the second floor level. Perhaps one opportunity would be to have a "laundry chute" leading down to a mill above the lower level to go down to a mash tun. That is how breweries were built in pre-prohibition days.

Sounds like a lot of work, but could be pretty cool..