You can use something like this
plug in voltmeter to keep track of battery voltage, plus it can come in handy if you need to charge devices via USB. Adding something like this
battery maintainer will keep battery charged, trickle charges preventing overcharging chassis battery. Many motorhomes do come with the capability to charge both house and chassis batteries when plugged into shorepower, trickle chargers are a good alternative if a motorhome does not have this capability or if charging solenoid is faulty which can be an expensive repair.
We use our motorhome throughout the year but on occasion it will sit unused for a few weeks, prior owners hardly used it last few years they owned it as they were in their 80s and dealing with health issues. We purchased it and other than changing tranny and engine oil along with a fresh set of tires as they were aged out, we put 25K miles over 3 years without any issues. No problem taking your rig out for a spin as you wish but motorhomes along with every type of RV class tend to sit unused for months although keeping batteries charged can be an issue.