Over the long haul, I doubt there is any savings if pulling a TT. There may be if you stick with a pop up trailer. After the purchase price, the major expense of having a TT is the cost of gas, so to a certain extent, you can control costs by taking shorter trips. When people ask if I save money by traveling with my truck and trailer, I reply that I highly doubt it. But it is for us a much better way to travel because we have our own house on wheels and we can cook our own meals. We love a good restaurant as much as anyone, but eating in restaurants for 3 meals a day for extended periods gets to be a real pain if you are trying to have a healthy diet.
It boils down to looking at fuel costs when you know you are only going to get around 10 mpg towing and if you stay in private campgrounds, your nightly cost will be in the $40 to $50 range (full hook-ups). You can save by staying in state or federal parks.
Is it a way to save on traveling costs? I don't think so. Is it a great way to camp, travel and explore? You bet!!