Sounds like your battery is ok. Suggestion of using a meter is correct. Many coaches have things that will drain the battery, like smoke detectors, radios etc, even though the coach is not running. I use a battery maintainer to avoid this problem.
Great idea to make sure your cables and connections are clean and tight.
IF you suspect your battery is being drained, connect your meter (using DC amp scale) in series with the pos cable coming from your battery. In between your battery and the pos cable. If you see major current draw you should try unplugging fuses, one at a time. When the current flow stops, you have found the culprit.
Could be many things, maybe someone else can chime in.
Good luck, let us know what you find
Hoyt
