I'm new to travel trailers but old to utility trailers and old to flying airplanes.
When I worked for a living we always used check lists.
Most of the time I flew it was boring....lol that's good.
Terror...well you get it
Use a check list if you're not sure.
Make up a list before you leave...
I.E. Use a neumonic list
GUMPS for airplanes is a very simplistic one.
Gas On / Off, Undercarriage- Down and Locked, Mags Both On, Pumps - All Fuel Boost Pumps On, switches -All heat as required, radios set etc. etc... i think you've got it by now
So for a trailer make one up...
Every time you roll, use the check list.
Every time you stop check the variables and eliminate the uncertainty..
Makes it fun and more important ...Safe for everyone

Happy Trailering,
Duer