State to state relocation is especially hard to do on your own. If you have the resources, this is the time to draw on them. Your sanity and safety will be ensured if you go with a long distance moving company who can do the hard part for you, leaving you free to focus on the things that really matter.
State to state relocation is tough to do on your own because it's not just a matter of packing the truck. You've got to drive it, too. Even the most seasoned driver can be thrown off when sitting behind the wheel of a gigantic moving truck. It is much more stressful and considerably more exhausting to drive a large truck on your own. Further, it is likely to be less safe.
For these reasons, it is often wise to seek the help of an experienced moving company. They can do the loading and driving for you, and even provide insurance on your belongings to give added peace of mind. They can also give you a more accurate estimate of how long it takes to drive to your new state, and provide you with ways to stay in touch with your driver throughout the move.
These features make it pretty difficult to beat what a good mover has to offer. There is no need to suffer through the moving process on your own. What little money you save, if any, is not worth the stress and fatigue that are inevitable when you try to go about it alone.