I have posted this in other forums too, I am really having a hard time making this decision...The ports we are traveling to, Belize, costa maya, cozumel and grand cayman, do not require them. I will be traveling w/ my husband and 2 sons, 1 and 4 at the time, also my retired parents. This trip is already a huge stretch on our budget, but I feel it is important for us to travel. I don't know when or if we will be able to do this again any time soon, so I don't know if we will even need them again. It is going to cost us $310 to get passports for my family. If I can get by on birth certificates and DLs, I don't see why I shouldn't. I know $310 doesn't sound like a lot to some, but to us, a young family with lots of expenses, it is not easy to just come up with it. I know it is the safest option, but I'm sure not everybody gets them, right? Any advice is appreciated. Thanks!!