What is the max length travel trailer you think is practical

I tow the TT in sig. Most state parks tell me I need to be under 50' over all to use their sites or park off site. This has never been a problem as I back as far in as practical and I'm good to go.

Over swing on this 32' hitch to bumper can be critical in some of the small fuel stops I've made. Never been wedged, but close at times.