I have all my clothes, the helmet & tools, computer nerd electronics I can't live without, and my wife's clothes. All she is taking on her flight is one carry-on bag.
I take a laptop and some external speakers so I can have some music when I am in the room. I hve chargers for the electronics, and of course a real camera.
In the end the car is packed to the limit.
This is at the hotel in Savannah, GA.
I have a lot of bags. Every Parade there has a "goodie" bag with stuff and a bag. I have a lifetime supply of backpacks and laptop bags. They come in handy for packing a 911.