There have been a couple of requests for this, so I thought I'd start on one. I'm certain I'm missing some good stuff so feel free to add/comment. I'll try to clean it up and organize it after a few days.
Campsite:
Gear - stowed
Clean up - complete
Slide top - clear of debris
Slide area - clear
Do the following in a "sterile" environment, eg, no side conversations, distractions, or interruptions. OK to split duties by section.
Trailer interior:
Table - stowed
Cushions - stowed
Counters - cleared
Lights - off
a/c thermostat - off
Furnace thermostat - off
water heater - off
Water pump - off
Bath faucets - off
Shower - stowed
Bathroom door - closed
Pocket doors: Open and secured
Sink faucet - off
Sink - drained
a/c water heater element - off
Windows - closed
Bath vent - closed
TV - stowed
Fridge - set to 12V
Fridge contents - stabilized and sealed
Fridge door - latched
Cabinet doors - latched
Slide - in
Hitch connection
Coupler - latched
Jack - retracted and stowed
Jack pad - stowed
Safety chains - connected
Breakaway brake cable - attached
7 way connector - latched
Weight distribution hitch - lubricated and tensioned
Sway control - lubricated and set
Tools - stowed
Trailer exterior
Shore power cable - disconnected and stowed
City water hose - disconnected and stowed
Satellite/cable coax: Disconnected and stored
Satellite antenna/dish/dome: Stowed
Propane cylinder - valve closed
Stabilizers - retracted
Stabilizer pads - stowed
Lights - off
Door - closed and locked
Step - retracted
Railing - stowed
Storage door - closed
Water heater door - closed and latched
Outside shower faucets - off
Shower door - closed and locked
Operational
Tow vehicle fluid levels - checked
Tire pressures - checked
Headlights - checked
Brake lights - checked
Turn signals - checked
Running lights - checked
Pets - secure
Engine start, roll forward
Oil pressure - check
Fuel level - check
Brake controller - connected
Trailer brakes - checked (rig stops with trailer brakes only)
Legos - stowed
Storage door - closed and locked
Final walkaround - complete
Family members - seated in TV
Bladders - emptied
Seatbelts - secure
Navigation - ready
Dump station
Gloves - on
Hand sanitizer - ready
Sewer drain area - rinsed
Blackwater
Gate valve - closed
Cover - remove
Hose inlet - connected
Hose outlet - secured
Gate valve - open
Tank - drain
Tank - backwash as needed
Gate valve - closed
Hose - disconnect
Cover - secure
Toilet - add chemical as required
Toilet - precharge water
Gray water
Gate valve - closed
Cover - remove
Hose inlet - connected
Hose outlet - secured
Gate valve - open
Tank - drain
Tank - rinse as needed
Gate valve - closed
Hose - disconnect
Cover - secure
Hose - rinsed and stowed
Sewer drain - rinsed
Gloves - discard
Hands - sanitized
Sanitizer - stowed
Water pump - off
Faucets - off
Step - retracted
Railing - stowed
Door - closed and locked
Fresh water fill
Fill source - potable
Fill hose - clean
Tank - full
Fill cover - closed
Fill hose - stowed
Storage door - closed and locked