The idea that crew would have to "get to" and then don a chute seems bizarre to me. Modern emergency parachutes are far lighter and more comfortable to wear than the military chutes from the 50s and could be worn by pilot and co-pilot with little or no seat modification. Flight test crews on MD-80 and MD-95 high risk flights wore standard military chutes with the only modification being removal of the seat back cushion.
I have never seen the boomers station of a KC-135 only that of the KC-10 so I don't know if a modern parachute could be worn there.
(I have over 2,500 hours pilot in command time wearing a parachute. Never needed it but glad I had the option.)