No, I never zip them together first. With just a little practice, it's pretty easy to reach back and zip them together while wearing them.. And totally easy to unzip them when I want to take the jacket off.
'09 R12GS, '05 GSX-R1000
Iron Butt # 4999, WERA/CCS EX # 666 (currently, expired), AMA Life Member
Racer, Drummer, Bassist, Software Engineer