Good, go b&b or travel lodge;
Bar bag: food that your going to eat during the day, phone charger, medical kit, face cloth for hot days, tool kit, spare tyre, wash bag, battery bike lights, head torch
Saddle bag: evening clothes (one set) spare pair of underwear (2 sets if traveling a country known for its rain) sleep wear, spare cycling clothes, and a secondary layer for cold days If you buy merino clothing, you can live in for up to ten days without causing offence to other people's noses) . Waterproofs- strapped to top of saddle bag.
Wash the kit out at the same time you shower, and dry first within the towel and then over night. Tilley used to do some travel socks that you could wash and dry overnight. When I did lejog I bought three pairs, and every time they were dry in the morning
If you've got bottle cage mounts, then look to fit a mount that can carry a drinks bottle that you can buy from a newsagent or shop.
If you can get used to eating coldfood, raw vegetables, fruit and nuts.
Otherwise it's on line research time. Websites such as the radavist and bikepacking is full of articles about people's experiences with different types of kit, how they pack and where they've travelled
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