I didn't have my scan until 21+6 but the measurements were:
HC (HEAD CIRCUMFERENCE) 179mm
FL (FEMUR LENGTH) 35mm
AC (ABDOMINAL CIRMUMFERENCE) 160mm
According to the chart the hospital gave me the baby is between the 30th -50th percentile.
I never found it that difficult to leave the house, and it was hard for me because I was living on a top floor flat with no lift so every time I had to go out I had at least 2/3 journeys to get the buggy downstairs, baby, me and bags etc. I just had a routine.
I never carried a million things with me either though, I'd meet my NCT friends and they would be there with bags almost bursting at the seams and I could never work out why as they all BF. I just carried a small change mat, couple of spare nappies and wipes, nappy bags and one change of clothes. Obviously you probably have to have a fair bit more of you bottle feed and probably requires a bit more preparation leaving.