I have been doing travel for 10yrs now, and for the most part..it depends on what you want. There are married couples who are both nurses, or nurses and therapists...etc..etc.. doing travel together. There are spouses who work in all kinds of different fields who travel together. There are spouse who have S/O who travel together but not married. All kinds of people out there traveling. Those with children who do this full time, and home school children, and those who do long term assignments, and or just renew/extend until they're ready to leave. Every kind of scenario you can think of is out there!
For the most part you can usually extend or can find assignments close to home. I stand in S. C. for four years while my daughter finished high school there at a private school. But many hospitals are starting to put a limit on the distance away from the hospitals, from where travelers can be from. Most say at least 50 miles or more. This is to keep local nurses from leaving the hospitals, and coming back as travelers, which is done a lot! In fact I did it. I lived less than a mile from two contract hospitals.
I must admit though...in trying to stay away from bad hospitals...sometimes I nurse may have to take less money....in order to stay in an area. But in areas where the shortage is the most critical...,most have no problem staying where they are.
I must warn you though...traveling can become addicting!
Good luck if you decide to do it!