Arriving Logan midnight Oct 17 with two teens for whirlwind college visit. Plan to tour BU and BC on the Wed 18th, then travel to Maine early am the 19th, New Hampshire the 20th and Vermont Sat am the 21st, driving back to Boston by late Saturday in order to make a 6:45 am Sunday flight out of Logan. Airport hotel or Back Bay area on 17th-18th? Get rental Wednesday night or Thursday morning? Rent at airport or downtown? What is best time to leave Thursday morning to avoid traffic going north to Maine? It's a 3 hour drive and need to be there for a 1pm Thursday appointment. Finally, is a 4am car rental return Sunday morning a good idea or return Saturday night and take airport hotel shuttle Sunday morning? Never been to Boston or the NE region, all tips welcome.