We now have brakes on the trailer and we can stop way better, but I still try and leave a lot of room ahead even if cars take advantage of it and keep filling it. I'd suggest to anyone towing to do a couple panic stops in a controlled safe area a couple times to see how bad it can get. With no brakes you can increase distance in front of you, but still can't control someone pulling in from a side road or someone else entering your lane carelessly.I agree with what has been said so far. Only to add in . Be very very attentive when towing on the highway.
After I towed mine 6 or 8 times I got comfortable and started to relax. Bad for me.
One split second I looked at something off the side of the road, the next split second I had a line of slowing cars in front of me and I needed the shoulder to keep from hitting the one directly in front of me. On the shoulder was a police officer reforming a traffic stop. I stopped with a couple car lengths to spare but I was all puckered up!
You don't need to be all white knuckled about it but always keep in mind that you can't stop anywhere near as quick as you normally can. Let the passengers do all the rubbernecking!