Hi, Jennifer! The dress code at Bistro de Paris allows for shorts, capri pants, and t-shirts (as long as they are not offensive), so you really shouldn't have to worry too much about a change of clothes. Shorts should be dressier - not the cut-off variety, and you often see men wearing solid t-shirts or golf shirts. Many women wear skorts, capris, or even nicer (think khaki, Bermuda style) shorts.
The official dress code for this restaurant can be found by clicking
Bistro de Paris Dress Code. You can double check what's acceptable so you know what works.
If I was going to bring a change of clothes, the kind I brought probably would influence where I stored them. I could easily toss some nicer shorts, a clean shirt, and maybe a broomstick skirt into a backpack and not worry about wrinkles. If you want to bring slacks, shirts, or a nicer skirt, you may be better off hanging them in the car so they don't wrinkle throughout your day. The locker is also a good place to store stuff, as long as it's something you don't need to hang to keep wrinkle free.
This is a really wonderful restaurant, and I hope you and your husband enjoy a fabulous meal!