Some great suggestions above already.
Set of lightweight dishes and cookware.
Silverware and cooking utensils.
Dishrags and dish towels.
Pillows, blankets, sheets, towels, and washcloths.
Garbage bags, large and small.
RV or Marine type toilet paper.
RV sewer treatment, either liquid or drop-ins.
Soap, shampoo, toothpaste, toothbrushes, hairbrushes, etc.
Spare blow dryer.
Spare iron and small ironing board.
Small grill, either gas or charcoal.
Games, indoor and outdoor, if you have kids.
Bicycle rack and bikes.
8' step ladder.
Assortment of ropes and bungee cords.
Tablecloth for picnic table (as well as hold down clips)
Awning lights and clips if desired.
Citronella candle and/or bug spray.
Cleaning supplies: mop, broom, dustpan, floor cleaner, small vacuum cleaner, toilet brush, etc.
Mike in Tennessee
2007 Cruiser 30QB
2008 Ford F250 Lariat 4x4 6.4 Powerstroke
Valley 16K slider
Ride-Rite air bags