I would have bought in bulk but I had intended on burning wood only this winter, discovered the joys of coal too late in the season to plan for a bulk buy.
You watch you language around here. We don't take too kindly to anyone discouraging bulk buys !!!!
Seriously it doesn't matter when you buy bulk. It will not go bad, it will not lose its punch, it just lays there on a pile.........
My dad always plans a bulk delivery in the coldest part of the year. To get to his bin, you drive across some loose soil/gravel mix. So he wants the ground frozen before the truck pulls up with 4 ton on the back. We get ours at home whenever we need it, although we do try to avoid any wet time since they drive across the lawn to shoot it through the window into the basement bin.
And if you get a load now, you will already have some when you decide to fire up next season.
If you got the cash, get it now.