It would definitely depend on her temperament - if she's a little on the shy side, suddenly being thrust into a new home with a ton of people who want to hold her, see her, etc, might be more than a little overwhelming. But if she is a pup with a 'bomb proof' temperament, it could be ok.
i personally would hold off on pottying outside until she is 16-18 weeks and has all of her vaccinations. i use a water bottle, it works pretty well! Esp in crates during travel. Make sure she has another source of water though, because sometimes they can't get enough water that they need from a bottle.
Food - keep her on what the breeder is feeding her when you first get her and if you want to try a different food, I would start it slowly, adding the new food to the old so she doesn't get her tummy upset.
Can't wait to see pics of her and hear all about her! WElcome to the forum!