OP - Much will depend upon how sophisticated the inverter/charger unit in your coach is... As with most things on coaches, different target price points for a coach, can effect the selection of the coaches components to meet that price point. So research what your specific unit is in your coach. A good quality 3 stage charger, with temp sensor compensation, would allow you to plug it in and forget it the majority of the time. (Always of course, maintain proper water maintenance and yearly cleaning of posts.)
GA Traveler also takes it into consideration the benefit of a unit that protects against heavy sulfating. In normal usage of discharge/charge, sulfating is reduced due to activity. When in extended 'float' mode, which should be the case when plugged in for extended time, the lack of activity is missed. Their is a large following on the Monaco owners site. of the pulsating devices:
PP-12-L PowerPulse 12-Volt Battery Maintenance System
The above seems the be the on that is used the most. If you have a good 3 stage charger, adding one of these can help protect from heavy sulfating.
Or, as GA Travler pointed out, the Batter Minder, in some models, has automatic de-sulfating built into their float/trickle charger. They, as well as PulseTech, have solar power charger units with the pulse/de-sulfating included.
If you do not boon dock too much, probably not needed, but I'm a fan of battery monitors. I actually have two, the BMK-Meter as part of our MS2812 Magnum Inverter/Charger. And we have the WhzBangJr added to our MidNite Classic 150 solar controller. Both of these devices, as well as the also very respected and popular Bogart Trimetric monitor - measure many variables of your batteries, like SOC and current voltage, etc.. They provide the info to make informed conditions about the health of your batteries.
If you are a 'park to park' with power camper, and for sure nothing wrong with that, then you may not need the extra monitoring.
Best of luck to you, have fun,