Woods Walker,
I'm with you on the blue barrel cutting down on a bruins interest level due to being airtight ("the eagle saw it, the deer heard it, the bear smelled it".........indian proverb) but to keep it in camp still raises the red flag for me, alarm system or not. A big determined bear is going to ignore you and your alarm. Been there, done that.

If that were my system I would set the barrel out of the immediate campsite, probably not far, and slap a black stuff sack over it. Of course it would look so much like a stump you would probably want a small strip of orange survey tape in the tree above so in those predawn morning starts you can find it easy.

(Instead of the survey tape I use a reflective "runners safety band" so my light hits it in the morning, attaches via velcro).

AND, you gotta have a stove. Bring it, you don't have to use it.