Door Latch Malfunction

[lonesome george]

Here is a simple tool made from 1/4" rod, 9" long with a 1/2" long 90 degree bend on the end, works great.
First picture is of the tool.
Second picture is of the tool hooked on the linkage going thru the hole in the lock face plate after the cap has been removed, just push down on the rod to open the lock.
We are headed to Wyoming in a couple of days and I remembered the potential for the latch failure and figured it is time to have some kind of countermeasure in hand before it's an emergency.