I love taking the kids to the beach. This year and last we went to north Carolina (Outer Banks). We go to a small community that has a sort of clubhouse. They have great activities each day for the kids (fishing in the pond, making a tee shirt, painting, jewelry, lots more, all for a small fee...$2 - $15) They have a common pool. Some houses have private pools. We drive to the beach (5 minutes). A pretty large place, plenty of places to bike, walk, etc. Our house comes with all the baby stuff we need and very kid friendly (beach chairs to take to beach, bikes for kids, etc.) website is
www.pirates-cove.com
Also have gone to Destin, FL. The beaches are white and so beautiful! We renta house right on the beach and that is the vacation. When the kisd want to play, we walk down our stairs and play in the sand all day. It is nice, because we can bring the baby monitor when out little ones are alseep (lock the front of the house) and hang out on the deck. We rent from Abbott Resorts. They will send you a catalog to check out all of their houses (and condos etc.) They have all price ranges, on the water and off, 1 - 5 bedrooms, etc.
Next year we are trying Fort Myers Beach, FL. Renting a large home on the water with 2 other couples and 2 kids each. Should be interesting!
All-inclusives are worth looking into (Beaches have family friendly resorts). Mexico can be cheap (Cancun?). How about a cruise? Disney land and sea can be fun, or just a family friendly cruise?
Good luck! Family vacations are my favorite! Sometimes it becomes my part-time job to find the perfect spot!