Most campsite boundaries are well marked. If you're not sure of the boundaries, ask neighbors, or as a general rule of thumb, line up your sewer and electrical hookup with the guidepost.
Have the LP gas system inspected every spring before using the RV. Take your RV to a qualified service center and let them check the LP gas system for proper appliance operating pressure and to check the system for leaks.
With your tow vehicle and trailer connected on a level surface stand back and look at it. If the lowest point is where the trailer tongue coupler sits on the ball mount you need to talk to your RV dealer about a weight distribution hitch.
If you accidentally get battery acid on your skin, flush it with lots of water and if it gets in your eyes you need to flush your eyes with low pressure water for 15 minutes and call a doctor.