I replaced all the storage doors locks with combi-cams. One of my best mods ever.
True that the numbers are a bit difficult to read at night.
In our part of the country, I'm not concerned with safety. Campers are respectful (I know, I know, it only takes one...).
Anyway, my 4 combi-cams have the same combination number. Makes it easy to remember.
The advantage with these locks, is that they keep the door closed, even if your 3 unlocking digits are showing. You must turn a know to open/close the door.
So before I travel, I move by one digit the "wheel" of the 1st digit. For example, if my combination is 234, I will move the wheel of the 2 by one digit, to show 134. Once arrived at destination, I know I have to move that first wheel by only 1 digit to bring it back to 234. At the campground and at home, I leave it at 234. With the combi-cams, you still have to turn the knob to open the door or to keep it closed.
I hope my explanation is clear enough. In a nutshell: get the combi-cams! Once they see it, all my camping friends want to do that improvement.
Adios storage keys and hello convenience!
Cheers,
Marc