Passed out during prep and twice at hospital with last colonoscopy. better split prep or all the previous day? better less sugar? (will hydrate)

Depends: During the procedure they do give you a sedative so you won't remember much of the colonoscopy until you get up. Did that happen? If so, that's the intent. If you were unconscious prior to being given the sedative then that's another story and you may want to confirm with the doctor's office what's best to do in your case. It would be good to get the colonoscopy done once and for all that easy 4 U