Have the deer been fed protein before or are any of the neighbors feeding? How many deer do you think you will have using these two feeders? IME the biggest mistake I see made is when people start to feed in an area where the deer have never seen protein or a protein feeder is the fill the feeder completely full when starting out. If the deer have never seen protein, I would put a bag of corn in each feeder to train them to eat from the feeder. Then mix one bag of corn and one bag of protein to start them on protein. After they eat that, I would put 2-4 bags of protein in each feeder. Then judge how long it takes to eat it all up. Then only put in a enough feed to last 4-6 weeks. Nothing worse than trying to train deer to eat, then once you get them started they are eating 2000# of old feed. Keep the feed as fresh as you can and fill the feeders to what the deer can eat up completely. That keeps the feed fresh, keeps weevil/brown bugs out of feed and that will keep the feed from getting moldy. Mold can happen since pellets are manufactured with some moisture. Dark colored feeders hold a lot more heat, heat in a humid climate makes pellets mold if they are not being consumed in good quantities on a daily basis.
I would do bag feed till the volume gets high enough to warrant bulk. Some feed stores offer feeding filling services and some even have bulk. Some have trailers to use and some offer filling with their own bulk truck. Used to be that bulk was about $25-$30/ton cheaper than bagged feed when comparing both of them delivered in the same quantities to a ranch.