We do the very same and found: one garment bag down for insulation, the two pieces of luggage, a cotton bag for dirty clothes(it will stuff in the corners), a roll of bounty paper towels for the windshield with a spray cleaner. We put a pair of shorts and two car show tee shirts in the left storage and take off. We have spent 4 weeks on the road making sure that about every four nights we stay in a place with a guest laundry(usually a Hampton).
All of our vettes have been convertibles. After we unload at night we can still get the top down and cruise the new locations. And thanks for sharing. cutnout aka charlie