Your shakedown tour sounds like great fun!

Since, you've asked twice - I will suggest a few items to cut. Clothes - I carry one set on the bike, one set off the bike. I live in Colorado, so I carry tights and a warmer shirt for cold weather. Shoes - there are some very lightweight, real shoes out there. For a number of years I carried flip flops as off the bike shoes. Now I've upgraded to Skechers Go Walk. They make men's also.

Cooking - you will soon know if cooking is a fun evening activity or a chore. I quickly downgraded to a Jetboil for oatmeal in the mornings and soon abandoned that for either cold food, or restaurant food. For many, cooking is an important piece of touring.

I carry two tubes and a patch kit. Depending on availability of bike shops, sometimes a tire. I used to carry a spare brake rotor and cables. But I decided I tour where bike shops come up reasonably often, and that my bike is in good touring shape before I leave.

Have fun!