well that's about 650-700 lbs of corn, a 55 gallon drum will hold about 350 lbs of corn, or mine do, I store it that way in winter at the farm, 3 55 gallon drums holds about a 1,000 lbs with a little room left over!
I would think that SHOULD last a few weeks for you

I didn't think you put that much out, most guys do maybe a 100 lbs to a pile, one or two spots,
and that can go in a few days if they hit it hard
at my farm a 100 lbs can go over nite out of my feeder in winter time! even had nites 200 lbs went over nite, but I have LOTS of deer so!

again good luck
hope you get some great pic's if not a great buck when you get there again !