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.
FS: 2009 BMW R1200GS
, '05 GSX-R1000
Iron Butt # 4999, (former) WERA/CCS EX # 666, AMA Life Member, Drummer, Bassist