I'm heading for LGA this morning for my second time ever; first time was over 10 years ago. A couple questions. First, while I'm not renting a car for NY (I *do* know better than that!) a side trip has come up that has caused me to rent a car from there to pick up tomorrow (Friday) and return Saturday. I will be going back to the airport to pick it up, and I'm wondering which terminal I should head for, since I'll have my pick of where the bus should drop me off. Does any one have an advantage over the others? The rental company is Hertz.

Second question is for my return flight on Monday, which leaves at what would appear to be the terrible time of 5:30pm. How much time should I allow for the bus from Grand Central at those peak times of day? (The schedule time is about 40-45 minutes for the NY Airport Service bus, but I wonder if that's optimistic for 3pm or so.) And if I end up back at LGA with an hour to an hour and a half to kill, is there anywhere in particular I should go check out? I'll be leaving from central terminal C (AirTran).

Any tips would be most appreciated.