I picked up one of those sets of foam balls on telescoping magnetic bases that you're supposed to use one on the hitch and one on the tongue to line up...
...but they don't work great for that on my vehicles.
Instead, I stick them them to back corners of the trailer, and it puts those yellow foam balls up closer to the window height.
I can't see either of my trailers out the back of my Renegade, and now that I have a cap on my Dakota, it's a ***** to see out the back of that, too.
I did learn that if I keep the spare tire on the 5x8.5 trailer in line with the rear door handle, it's straight.
