I have access to small piece of property at deer camp where fisher, coon, and fox have been seen and I would like to pre-bait prior to the season to make sure the areas where I can set will be frequented. I will only be able to get up to camp to replenish the bait once or twice a month at most, so what are some good sources of bait to use that will last the longest? How many weeks or months in advance should I start?

Any bait you leave out will be eaten by flies and maggots in short order. You can rot the stuff until it is a liquid before pouring it out at your location as a curiosity attractant. All the above will visit that type of scent station.

i have tried this with mixed results but most predators will return to area they have gotten a free meal if you are willing to do some work i read that buried meat will work better for foxes and yotes as they are use to digging in area to get a meal(dirthole set) plus will keep the birds away i have done well around areas that farmers have buried livestock and noticed coyotes will dig a long ways to get at a rotting carcess

I have poured quantities of fish fry oil into a large dirt hole that I dug with some success with coyote visiting on a regular basis. Bears also enjoy this so be aware.

I can draw every ant within 3ac with pre-baiting. To bury something deep enough so I don’t have to worry about ants or buzzards is generally too deep to get noticed by anything else. Too much other food around down here. Can’t even use any type of oil on a tree without ants covering it up.

Thanks for the replies. I was thinking maybe there is some sort of artificial bait or perhaps pet or livestock food with preservatives that might hold up well?

Road kill deer is good to use if legal. Salted fish is a good option too

Hard to beat bhugo's post i've used it along with fish oil, beavertail oil and molassas Also give an old snag or stump a shot of fox or coyote urine even a smear of castor smell lasts longer then you think and critters do not tire of it

bhugo- you're from Flint, what bears are you encountering?

One thing I've heard about was how Johnny Thorpe would hand a beer can Inna tree up wind of a hiking trail say 30yd. Apparently eveyone and then he would walk through and stuff a few dead minnows in the can. As they rotted the smell would create a draw station for any critter down wind of the trail. And after a while they would just naturally come off the trail and have a sniff. And that's all he need to catch them. I did something similar running cameras where I used fish oil but mad my can so it had the smallest drip. Sure enough had plenty of Grey's and rabbits that would stop just to sniff and mabye dig.
That along with ole cooking oil and stale dog food in a hole. Actually put some out last week with cameras to see what's around .

Take a 5 gallon bucket and cut 3 or 4 holes on the sides around the bottom. make them about 1 1/2 inch around. big enough for a coon to reach his hand in yet keep out the squirrels. fill it up with sunflower seeds and hang it so its 6-8 inches off the ground underneath a big cedar or hemlock tree. you will soon have every coon in the area visiting as well as rabbits and they will bring in the fox. Wait till after berry season but before the nuts start to fall. once its cooled down a few weeks before season place deer carcass under a bale of straw or hay either one. spend some time building cubbies and brush piles, Is there a stream where you could cut down a good crossing tree or build a small dam at a spring? If a food plot isn't possible perhaps a berry patch is, If your going to be hunting there for a while plant you a few apple or pear trees. or maybe a couple of each, In just a few years when they are loaded with fruit you'll be glad you did.