Cam across this post on Kijiji for anyone in Calgary.
https://www.kijiji.ca/v-free-stuff/c...ationFlag=true
Also, neighbors kid works at the Canyon Meadows theater and they have 2-3 black garbage bags/night of popcorn that just gets dumped. Said the manager would probably give it away if you asked. Only problem is its mixed with other garbage.
Good luck with the hunts.