IMHO toss any autoreset breakers in the trailer and replace them with the same footprint "push to reset" or remove and reinsert to reset type. they cost very little more and AFAIK for every autoreset, a manual reset version is available. yes, a little more inconvienent but WAY safer.
the biggest issue with the autoreset is they do just that. trip, cool, reset, trip, cool, reset.... forever if the overload is NOT removed. so if you develop a short downstream of the breaker that you can't interupt, well.... sooner or later the wire gets to hot or the breaker finally gives up in the open position and not the shorted position.