A couple of aluminum folding tables are very handy, inside and outside. Light and fold fairly flat for easy storage.
Amazon.com : Travelchair Side Canyon Table, Silver : Camping Tables : Sports & Outdoors
A box of vinyl gloves for dumping your tanks and a bottle of hand sanitizer to make you feel even better afterwards.
A decent tire pressure gauge. A tire plug kit and a small compressor.
A small electric heater. Personally I like this Vornado model. It's the best one I've found concerning heat/noise ratio. I'm a pretty light sleeper and it usually doesn't wake me up as it turns on.
Amazon.com - Vornado PVH Whole Room Panel Vortex Heater - Space Heaters
A Taylor GS-Mini guitar - What's a campfire without a little music? Compact, easy to play, easy to store and sounds great.