Trailering FE

What is the smallest enclosed trailer being used out there in FE?

What is the smallest enclosed trailer being used out there in FE and you don't hate your life every time you have to load it to go to/from the track?

I know the best way to trailer is usually "go as big as you can afford/your vehicle can pull" but I'm curious to what everyone is using.

Thanks!

Trailering FE