I've been there and done that with some of the gear on the back seat and saddlebags but not anymore and why we bough our first trailer before the ST.
Basics are:-
3 person dome tent when on my own/4 person dome tent for when Heather is on board. Tent high enough for Heather to stand up and change.
Single burner stove, grill plate and spare gas plus cooking gear, paper plates etc. all stored in plastic container
Queen air bed on my own/Queen size double height air bed
https://www.airmattress.com/coleman-double-high-quickbed-queen-air-mattress/Rechargeable airbed pump/deflator plus backup 12 volt airbed pump
Two sleeping bags used as blankets
Two pillows plus sheet for bed
Esky
One or two fold up camping chairs depending if it's a solo or duet trip
Dolphin Torch, Hammer (for the tent pegs) Battery powered LED camping light
And the trailer which also doubles as table should I/we need one