Really pocket screws are totally sufficient for this. I guess I was just saying if you were coming from a woodworking / cabinet making background or something you might think of better joinery techniques since you are essentially constructing a modified cabinet carcass. Maybe some kind of dado or spline joint - but again, not really necessary and more work, requiring more specialized tools, than pocket holes.
I was just covering my bases in case there was a cabinet maker reading this thread. Haha
Also update on this project coming soon if I can get some pictures made!