Just ran across this. A 5.5 x 10 foot tent that uses your existing EZ-up as its frame. Since it's half the size of a 10x10, it leaves enough room under the canopy for your bike, chair, cooler etc.
No poles, and while the front corners are meant to be staked I see no reason why it can't just be tied to the canopy legs.
Just unhook when you get up in the morning, bundle it all up and chuck it in your car. End of the day, reverse. Simpler than a regular tent, and way roomy... standing headroom.
They also make a 4-person version that sits off to one side of the canopy (which means it could be left set up all day), but it requires stakes and has a pole. Most of the tracks I go to, you're either on pavement or the ground is so hard there's no way you're going to get a stake into it.
Best part: This one is on sale right now for $26 (!) at Walmart, with free ship-to-store. At that price, I'm going to take a flyer and see if it'll work.
https://www.walmart.com/ip/Ozark-Tra...Tent/224906920