I got stopped in overland park , ks last night. My truck is a 3/4 ton dodge and I pull a 12' single axle. He said that I needed DOT numbers. He performed a full inspection of my rig. It passed. I have several questions. Occasionally I tow a 7k trailer also. 1) Where do I go for my DOT numbers? Highway patrol? I live in MO and work in KS 2) How much insurance do I need and what type? Currently I have personal insurance that covers up to 100k. 3) Do I need a CDL? I've never grossed over 13k 4) Does the trailer need its own number? I subcontract and the trailer I use is provided I don't own it.