Purchasing the wood a week or two in advance would be advisable to insure it is perfectly dried before use. It should be stacked in a well ventilated area to dry surface moisture to enjoy maximum BTU value and ease of use. That would also prevent creosote buildup in your chimney.
Aspen stockpiles
This image shows the trailer I use to deliver. It's capacity is 2 cords when filled to this level.
Photo of what approximately two cords of wood cut to 13 inch length looks like. I can deliver up to this much in one load. This is my personal wood supply. My stock is usually cut to 15" lengths
(I dont heat exclusively with wood)