Around here KD Doug fir is used.
When I mill for a customer I don't charge for milling enough sticker stock for them to stack all of their wood on as I go.
When milling my own stickers I pick a few logs, and set up the chop saw with a stop on the flat bed trailer so I can cut a hand full at a time and mill up a pallet or two in a batch. Sticker each layer at 10"-12" oc as you build the pallet so they can start drying . Trim out the worst sections and set a standard, either it is a good sticker or it is not
kind of thing. I mill mine 1"x 1 5/8" x length of forks, that lets me pull stickers off of either 1" or 1 5/8" stock later, they lay out quick and provide plenty of air flow.
A lot of customers are surprised to find out just how many stickers it takes to stack a unit of wood at 18" oc, and that 48" oc is not sufficient