https://www.rvupgradestore.com/rv-tow-bar-comparison-guide-a/599.htmIf you go to YouTube, you can view the operational videos of the various tow-bars, that might help you decide which locking system might be better for you.
type in " blue ox towing part 2 towing hookup" is a good one that explains the operation.
It helps for the rv and toad to be on level ground and in-line straight to hitch/unhitch. I like both my bars to click and lock when I hitch up. Most people get by just having one bar lock and the other falls into place when you start to drive. If that's the case, you need to turn the toad steering wheel slightly towards the unlocked bar, as you pull the rv forward that unlocked bar will lock into place as soon as you pull forward.
500 miles is a full days drive I don't see that being any kind of issue of a restart. My automatic Chev Sonic has a 200 mi restart and I do that at fuel stops or a rest stop walk-a-round. 200 mi is 3.5 hrs of driving which is time for my young body to take a break.
When I gas up the rv I sometimes have to wait for a pump that allows me full drive-thru without having the fear of having to backup to get out of a crowded gas station . You can't backup with a toad, always be sure that you can 'escape the pump'. :)