LionTamer,
We did pledge pick-up the same way, only if we bid 2 roommates or girls on the same floor, we got them all at once. We were far too lazy to make 2 trips.

The main rule was at 6:00, when the sororities started coming around, if you knew you were getting picked up, you went in your room and kept the door closed until someone knocked - NO exceptions!!
If you went through rush and hadn't gotten a bid, you got a phone call early enough so you could get out of the dorm or go home for the weekend and not have to sit through it. I know that there must have been times when the girl opened her door to something other than her first choice and had the "oh crap" look on her face - but I still think it was a lot better than doing it all out in the open at the student center or a yard in the middle of campus. The nice part was being able to share that moment with your dorm friends who had helped you get through the week.
The memories are flooding back as I write this - I feel like it all just happened an hour ago.