What you really need is a good spreadsheet.
I have one for each type of trip that we do (family, work, camping, centre parks, overseas beach holiday) with a list for each that I refine every year as the children get older.
I then do a scenario based assessment of each day, looking at what I intend to do, and what I will need to do it. I then update my spreadsheet accordingly. When I get back I check to see if there’s anything on the spreadsheet I need to change. (Get up: dressing gown, slippers, caffeine, favourite mug. Feed llama: tinned llama food, food bowl, water bowl, tin opener. Make breakfast: bread knife, chopping board, bread, butter. Washing up: dishwasher tablets, scrubby pad, washing up liquid, dishcloth, tea towels.
I don’t like being unprepared for anything, and this approach helps me relax.