Protect front shock with frame protection tape.
Use a Large Peanut Butter Jar. Drill holes in jar. Use 3+ heavy duty tie wraps to attach. Makes for quick access to my rain gear (jacket and pants) with room to spare.
Another lightweight option, a little larger is a Clorox or Lysol wipe canister. Holds my cooking kit (stove, canister, lighter, and pot). Probably going to add a strap and spray paint black and add stickers.
Testing still in progress.
Test#1 15 miles, 7 on bumpy gravel levee road. Strong headwinds/fast tailwinds on way back. Stove makes too much noise/rattles. No other issues so far.