Help! I've never flown out of Boston before. Usually fly out of Hartford, but I won a trip, and the flight is on Airtran, so we're flying out of Boston. Myself, my 3 year old, my friend, and her 5 year old. Flight at 8:47 on a Wednesday, so tha plan is to drive up the night before and stay over. Where should we stay, and where do we park? I'm thinking about doing one of the park, sleep & fly packages - has anyone used one of these at a hotel near Logan? Or I thought of trying Priceline, but I don't know where we would park, and if parking would cost so much (Tuesday night - Sunday) that it would cancel out any priceline savings. What about parking futher out and taking a train in to Boston? Is it safe to leave a car at one of the stations for that long? Would it save money? Too much of a hassle with the kids?
Basically looking for the easiest way to do this, without spending a fortune in the process. The airport Hilton looks like it would be really convenient, but it's a bit more than I want to spend, and I don't know where we would park. But, I've read that the Hilton and the Hyatt Harborside can often be booked on priceline, but again - where would we park, and how expensive would it be?
Thanks for any help!
Basically looking for the easiest way to do this, without spending a fortune in the process. The airport Hilton looks like it would be really convenient, but it's a bit more than I want to spend, and I don't know where we would park. But, I've read that the Hilton and the Hyatt Harborside can often be booked on priceline, but again - where would we park, and how expensive would it be?
Thanks for any help!

We're losing Logan Express up here in the poor-relations part of the state. Massport claims we can "easily" drive to Woburn and ride from there - but the cab will cost me as much as it would just to go directly to Logan. So, Massport is losing out on ALL my money. So there! That'll teach 'em! 
Heck, I'd do the same thing!