If you can store it inside or at a minimum under a roof you will lessen the affect of UV rays which is a major cause of exterior damage. In addition, keep things clean, well lubricated, a couple times a year waxing/polish will be good. I'd suggest reading every pamphlet/owners manual that you can find and understand how things work and the recommended periodic maintenance. Check all appliance outside access doors periodically for dirt, bugs, debris and check for early signs of leaks, pinched wires, and the like. Pick a nice sunny day and get it done. It is not a chore just the price of being able to "RV".
Once a year get up on the roof and check for sealants drying out, lubricate the OTA antenna, check all coax connections for tightness, rust and take action if required.
If you've been reading the forum you will have read about some class c's developing leaks in the over cab area. It happens and now that you know it happens you can take steps to monitor (but not worry about) the area for damaged sealant.
To me my RV is no different than my '72 MG midget in that "There was always something" but I still had a lot of fun with it.