THanks all, appreciate the input. My thought was, if PT "converts" 16bit audio files to 24bit when importing them into a 24bit session, couldn't I just "save session copy as" and select 24bit in the options window to get the same end result? Are these two processes not the same?
And on sample rate... as there will probably be additional audio recorded, and in mixing outboard devices used meaning more AD/DA processing , would I benefit going to 96 during this process? I understand the "voodoo" involved getting back to 44/16 for the end result, but this project will probably go to a proper mastering house for that. Mixing will probably be brought back to PT as 96/24 files to be delivered for mastering, so they can use the big toys for final processing.

As usual, I've gotten good food for thought here, thanks again guys!
Side note; Steve, I'm trying to figure out if I know you from somewhere. Born and raised Missouri boy here, live in St. Joe now (ugh) Was in L.A. for about 10 years, played the K.C. area alot and used to be the drummer for the Elders. pm me if you fell like it ,would love to chat, or maybe set up a midwest Gearslutz gathering

Thanks again,
TommyD