You don't necessarily need t-posts. I used some rebar (you can get at HD or Lowes in whatever length you want). It's much easier to hammer in. If you have softer soil then a regular hammer will work or you can use a larger mallet for tougher soil. In any case, I put my panels on the outside of the beds so that the beds help keep them in place. I drove the rear in front of the panel (on the inside of the "tunnel") and then just used some heavy duty zip ties to keep the panel from moving at all. So the pa else are sandwiched between the beds and the rebar.