On minimal kit, I take the same basic kit whether I’m doing 1 night or 4, more bait and more food but everything else is the same pretty much.
I could probably cut down further, and likely will this year for a new water with long barrow journeys. However all my kit fits on the barrow so nothing on my back.
Under Barrow bag with spares and other things like sack, tripod, etc. bedchair on top, rucksack, food bag and unhooking mat on top, rods on top of it all.
I’m like a few of you, I have loads of bits of end tackle I never use but just keep in the tackle box because of the dreaded “you never know” that hasn’t happened for 5 years+ 😂 need to sort that out this year!