ok, so do you think the moisture barrier you mention that is already in the bags is enough?Yes I think this is sufficient moisture barrier as long as you can keep rodents away.
How many bags are you planning on buying?
One 30 Gal garbage can is about $10-$12. You probably could put 2 bags in one can.
Would there be any issue to keep the bags in middle of the living room?
It could be your temporally coffee table
I think my wife might have an issue with the redecorating - I was lucky enough to put a bar/kegerator in the family/dining room area - I think a new "coffee table" might be the proverbial straw.
I am planning on purchasing ~10 sacks of grain, or enough to last me one year or so.
I had an idea to get these:http://www.amazon.com/Honey-Can-Do-VAC-01299-Storage-Vacuum-Packs-2-Pack/dp/B001F51ATO/ref=sr_1_5?ie=UTF8&s=home-garden&qid=1259355761&sr=8-5
I would think that these would provide an extra barrier of protection against moisture/humidity.
At $5 a pop, the ~$20 in shipping savings still makes it worthwhile and if we do another bulk grain buy next year, it will start to really payoff.