All Challenges Restrictions

All Challenges Items and stuff you can and can not prepare before the run:

You're allowed to have as much money and consumable items as you want beforehand. You're allowed to have any horse and any horse equipment and horse consumables beforehand. You're allowed to to have any kind of gun and ammo you want beforehand with these exceptions:
You're not allowed to modify any sidearm with a longbarrel beforehand. (for weapons expert 8)
You're not allowed to have any crafted shotgun ammo beforehand. (weapons expert 4)
You're not allowed to have any poison arrows beforehand. (sharpshooter 8)

Other restrictions:

You're not allowed to have any treasure maps beforehand.
You're not allowed to have any herbs beforehand. (berries, mushrooms, oleander, seasoning etc. all plants are forbidden)
You're not allowed to have any herbivore or predator bait beforehand.
You're not allowed to have any fish or animals on you beforehand. (survivalist 2)
You're not allowed to have any meats on you beforehand.
You're not allowed to have any pamphlets other than the ones the game gives you from the start.
You're not allowed to have any fish bait/lure beforehand other than what the game gives you.