There are certain items we typically carry in our aircraft, like spare engine oil, wheel chocks, tie-down rope, first-aid kits, and other emergency gear. Beyond those items, we tend to limit what lives in the baggage compartment to reduce clutter and excess weight.
If you have a little extra capacity, though, and you enjoy visiting fly-ins, pancake breakfasts, and airports near beaches, parks, and outdoor events, you might spare some of your useful load for a pop-up tent. These lightweight, portable shelters are known for easy, rapid setup and have continuously improved in materials, sun protection, and ease of use.