S-
IMO
1) plate truck at 30,000 # gcvw (very little $$ over a 28,000 plate. I got popped at 28840 with 3 suv load on a F350/ 3 car wedge)
2) as Crich said, get an IRP plate
3) you need IFTA
4) you'll log whenever you are pulling your Trl, loaded or empty
5) you need your CDL and Medical card...