Yes it's doable. My feeling is you can fly to your destination, rent an car and eat out every night and stay in a motel. You can do you destination in 4-5 days. However is you have an RV you do the same thing. However You can stay twice to three times longer. In your RV you can't add the cost of food because you got to eat anyway but you don't have to pay for high price restaurants food. The biggest cost is fuel and Campsite. But if you don't go into RV resorts you can get by cheaper. Of course this is not counting the cost of RV itself. The sames goes with fishing. If you have to add the cost of the boat for fishing you might as well buy the fish. Now what kind of fun is that.