I have a love/hate relationship with pellets, but don’t have the storage space to use shavings.
I start with ~6 bags pellets in a 12x12 stall and expand them in the bag with a couple gallons of water. Poop and pee is cleaned daily and the stall is totally raked through. I add about a bag–DRY–once a week, in whatever spot in the stall is the “clean” spot (where the horse is unlikely to go.)
My gelding that walks gets a big ol pile of bedding in the middle of his stall. He has a 3-4’ clear path around the edge. By morning, his bedding is pretty well distributed, but piling it in the middle before he’s brought in keeps it from being totally trashed. The mares get an assortment of bedding distribution, generally based on where they like to pee. Dove, for example, is a wall pee-er, so she has to have bedding out the the edges of her stall.
My horses are outside from about 6 am to 6 pm. The girls are pretty consistent about needing a bag of pellets a week, but Pigs sometimes takes two, depending on how much of a party he’s had in there overnight. They’re ALL big wetters. Everyone is fed in small hole hay nets, but I don’t think it slows them down much–just keeps them from peeing all over the hay.
It’s taken me months to have a “system” with the pellets that seems to work well.