I also replaced the mechanical unit with a digital Honeywell. It was a very simple upgrade with some of the useful tips related to the colour coding of the wires available on this forum as well as elsewhere on the internet. As we do not run the AC often, and never on the low fan setting, i didn't worry about the installing the toggle.
Just make sure you carry a spare set of batteries with you at all times. You never know when the batteries in the thermostat will fail, leaving you either cold or hot (depending on how far north or south you are camping).
The trailer definitely keeps a more constant temperature with this setup.
Bumper hitch for triple tow
2011 F350 6.7L SRW Lariat