The Aptera could lend itself to a great tailgating vehicle too. I will write separately on some ideas starting with
Outdoor Audio Speakers

Although conventional interior speakers can double for outdoor speakers. My Honda Ridgeline has rugged outdoor bed speakers. They simply have exciters behind the resin bed side panels and the resin panels serve as the cones of a speakers. The Ridgeline’s audio is simply switched to bed speakers. They designed an anti-annoyance feature to only operate if you decide to drive up to ten miles/ hr....to prevent people from blasting while driving in general.
Aptera’s unique resin may have some similar possibilities for this alternative speaker technology too.
Next... Imagine....
Hidden area under cargo area
I am not sure if there is a useable cavity under the Aptera’s cargo area but it might be nice for concealed supplies storage.
<- Just and example from my Ridgeline, where a (much larger) area under the bed is used for concealed and secure storage. There is actually a drain plug at the base too if the area is filled with ice for tailgating beverages and food supplies. Handy when shopping and storing food (perishables) here in the SW!
Inverter
DCor AC inverter. Again from my Ridgeline, but handy for higher wattage ac electronic needs.
Maybe even handy for a tire inflation pump
Love the camping option but these ideas add to the functionality of the feature