We'll never agree. I don't wear sunglasses. I don't even own an Ipad or laptop. I'm not much into photography. I must have bicycle shoes and slip on shoes. Where are you going? What time of year? Camping? Your list on the very same trip will be different than mine.
Short trips, like weekends, are great for figuring out what you want, need, and don't want.
A GPS in a remote area without smart phone service might be wise.
The big question is the difference between what you want and what you need.