It shouldn't really be dry at this time of the year unless they are getting it off the stockpile which isn't unheard of either. What you could do is ask you dealer to make sure it's at least damp, I always made sure it was at least damp. The breaker had a hose there which I'd use as a last reaort but the pockets were always open or it was fresh 95% of the time.
Have a hose ready for when he gets there and soak it for few a minute or two otherwise if it's dry. Also dampen your bin before they get there. The dust on the floor and walls will kick up otherwsise.
As far as the coal in the bin out will dry out, I'd suggest just wetting down what you need as you're shoveling it. Shouldn't take much.