Vacation or not?

We are debating whether or not to take a vacation to Orlando this year. We took our daughter just before she turned three and that was a good age and this summer our son will be the same age, but can we justify spending the money? Part of me says the kids are only this age once and you have to take vacations for the sake of family bonding, but the other part of me says until we are making enough money here and not dipping into savings a bit each month, we shouldn't spend money on luxuries.

Of course, we could just do lots of research and find the best deals on airline, hotel, Disney World, and Universal Studios Tickets. Our frugality carries over into vacation planning, and we've been very careful to get the best deals on previous vacations. But somehow, we always end up spending thousands of dollars. Usually the highest expense is park tickets and meals. The meal prices are so unpredictable and it's almost impossible to budget for that, but at least you can buy park tickets online before your trip and save money by planning ahead.