depends on the conditions, is there snow?
pits in general have short hair, a coat is almost necessary if temps fall below freezing, booties can be a savior as well. last thing you want is burning your dogs paws, he'll never be able to stay out long in the cold after that. a nice bedroll as well for at night, tuck him in bring him in closer to your body to share heat. just plenty of common sens. depends really on where you are and the weather conditions, I may be going over board, but the last time I went out tarp camping with mine it was -15 degrees celcius and that was warm.
Dog sledders put Vaseline on the bottom of the paws, to protect against cold temps, and avoid the paws getting shredded from constantly running ice/snow/ice. I don't see the harm even if your not mushing. raw meat also gives the body more energy and heat for the animals to store. But if you have kids, turning a pitbull onto meat is probably not the best idea.