Great advice from Roots66. Overlanding combines camping with travel, and each has its own requirements. From experience, I'd make sure to keep the first trip short, and include a compelling "main destination" which has something to offer, especially for younger kids. You'll find that you can plan routes in many areas which will seem remote, but are really only a few miles from civilization, for support and peace of mind as you build experience. Last suggestion - don't travel alone if you can help it. A second vehicle is the most useful thing to have in the event of a breakdown, and a second brain always helps when problems need solved.