I have a 1997 coach house 192TB wide body and have enjoyed it a lot. As everyone has stated make sure everything works. Make sure shore power is not plugged in and start generator when warmed up a bit try air conditioner. If it kills gen you may a have a problem. See if the heater works from thermostat. Make sure the heater heats not just blows air. Take a multimeter with you and with generator running check voltage to battery. Also plug in to shore power and check voltage to battery and all outlets.
Good Luck.