Just do check on them from time to time, especially considering the circumstances in which you got them. I had an entire bin of dried pintos MOLD once. I have no idea how it happened, since they were in an airtight container with a gamma lid, but apparently one of the bags I added to the batch was contaminated in some way and ruined all of them. 14 lbs of beans had to be thrown away.
Now I still store them in the bin, but in their original packaging. This way if one ends up bad, it hopefully won't spread to the rest quite as quickly.