Carol,
Even though I do check in on-line, I prefer to go inside of Logan for the bag check in. The JB Int'l check in counters are maybe 30 feet inside from the door and totally separate from all the domestic flight counters. Stood outside once in chilly Boston weather once, but you're in with all the JB flyers.
Years ago we were all lumped together and that was a mess, but kudos to JB for the change a few years ago. It is far faster to just go inside. This Saturday, it was rainy and damp and I laughed at those standing outside.
If I was down south, I'd stand outside more than likely.