If you think it will be easy to pick up on friday you are kidding yourself.
Preorders sold out in 45min. So that means there is a HUGE!! Demand for this phone. And since the preorders went so fast, many people are going to stand in line just like you are thinking of.
If you do,
1. Get there early. Like 8-10 hours early. You will want to be in the first 25 to ensure the model you want
2. Bring a chair. It get old standing or sitting on the ground
3. Make friends with those in front and behind you so that you can resume your spot if going to the bathroom.
4. Plan your location. Apple stores will have the most stock but will attract the most people. Keep in mind places like bestbuy or the carriers but understand that in Years past stock has been limited in those places. (they may get a lot but may not be the color or capacity you want)
5. No matter what, don't under estimate the demand for an apple product. Just when you think you can slack, you will find that preorders sell out in 45min and you are planning to stand in line all night.
Then again, you already know that