Hi,
I had to 'swallow the camera' last week and I insisted on the sedation because I was so scared. Well, having had it done all I can say is - don't be scared; agreed, it isn't the most pleasant thing you'll ever do but it doesn't take long. I think I felt worse the following day because of the sedative (made me weepy).
In the event that I ever have to have it done again I will do it without the sedative - as I said, not pleasant but not unbearable either