As a single person with a car full of stuff you will be scrutinized big time and if your story has any inconsistencies you maybe denied entry.
You may want to make your car look like you are not going on a one way trip. be very specific as to where you are going,where you will be staying and how you will support yourself financially,and of course exactly when you will be returning,, Going on a 2 week vacation to visit relatives is usually a good starting point where you may decide to extend the trip once there
but be sure there are real relatives as the border agents may call them to confirm/verify your intentions...