-Does everyone use a water filter when hooked up to city water? I do most of the time.
-Does everyone have a surge protector? Very necessary! Never plug without it even at my home.
-Do you use a water regulator and what pressure should I aim for? Yes. Always. Most are preset.
-My trailer has 2 dumps. Do most of you just switch the sewer back and forth or do you Y them together? No dumping until 2/3 to 3/4 full. Black then grey. Cleans the hose. I say no Y since the grey wouldn't clean part of it.
Stop worrying! You will have a blast.