Living an inexpensive way of life is great, but everyone needs a vacation sometime. Just because you go on vacation, doesn't mean that everything has to be expensive.
I remember when we were kids, we would take a loaf of bread, some lettuce, tomatoe and cold cuts along with us for the road. We would stop at a roadside park or mountain overlook, and make some sandwiches. Of course we always took a cooler full of juice or soda, so that we didn't have to pay convenient store prices. That's even easier in today's world, because you can pay for your gas at the pump, so you don't even have to go inside to be enticed with their flavored coffee and snack cakes.
Try researching museums and parks in the area where you plan to travel. It's great to take the kids to Disney or an amusement park, but the rest of the time, try to enjoy something that is a little educational and a lot less expensive.
Here's an article with a lot of great tips titled How to Find Free Things to do on Your Vacation.
May all your travels be....Lots of fun and mostly free!!!