What bag to get for this setup?

Hi all,

I am planning to take the following for some casual shooting in local parks, urban setting, etc. Any recommendation on a bag would be greatly appreciated. I prefer a shoulder bag as I already have an F-Stop Kenti backpack which l love for hiking.

5DIII with 85 1.2L II mounted, EOS-M with 11-22 mounted, 600EX-RT, and a couple of filters and batteries.

Thanks!