People tend to check in during these times:
If you are a frequent traveler join the Lexus Passport Parking program. 3rd floor and guaranteed parking spot
Level 4 has the bridge to Terminal C
Tues and weds are the high traffic days,parking fills fast,prepare to be sent to an outside lot if parking longterm
Call 617-561-1673 for assistance
They inventory the car here, that's how they tell you the location of your vehicle at exit express! I love this feature!
At this airport expect traffic all the time