Alyson!!
Where on LI are you? I grew up in Manhasset!
To answer your question... you'll find some folks are doing DCL, others are hiring tour companies, some are DIY, but I think quite a few of us are a combination of a little bit of everythingOur family's plans as they currently stand...
Valetta, Malta: DCL - Blue Grotto and Fishing Village
Tunis, Tunisia: DCL - Medina and Carthage
Naples, Italy: We've hired a driver to take us to Pompeii and Mt Vesuvius (my oldest DS wants to climb!) with a stop in Sorrento for lunch and a little shopping- cause you know if DS is going to make Momma climb - then Momma's going to make them all shop
Civitavecchia, Italy: We and another family are going via private driver and guide (Vatican) to Rome and see the highlights
La Spezia, Italy: DIY - we're hooking up with a few fellow travelers and going by train to Pisa
Ajaccio, Corsica: DIY - think we're going to walk into town - maybe see a couple of sites, go to the "market" and grab a picnic and then head to the beach and soak up the sun!
Villefranche, France: DCL - Monaco and Top Car Museum
So funny, we are in Great Neck, right next to Manhasset

Thanks so much for your info. Do you mind telling me where you found out about the private tours and such. Did you book the train ride? How are you getting in to different attractions, purchase before or purchase when you get there? This is all so overwhelming! We originally thought we would just go through DCL for most everything but now I am thinking if we can save money lets venture out and check out other options. It will just be the two of us traveling, our 3 kids will be with my parents, so we are really flexible.
Thanks!!
Alyson