Looking for Budapest – Kraków bikepacking trip recommendations

So I'm starting my trip either on this Saturday or Monday and spend the next week riding. I'm planning to buy a FlixBus ticket back home.

1. Do you know some places I must visit? Please keep in my that I can't afford long detours as I need to head back home on Sunday because of work.
2. What should I bring? My current plan is my sleeping gear, clothes for 15-30°C weather, some waterproof clothing and a pair of shoes apart from my SPD shoes. As for bike maintenance I plan to bring my bike tool kit, 2 spare tubes, patches and quick links (should I also bring chain oil and grease?).
3. Wildcamping tips? I already spent a few nights at camping sites but now I plan to wild camp, maybe ask someone to sleep at their farm/garden.
4. Is Komoot's time estimation accurate? Last year I did ~370km (completely flat) in 2 days for which the 25h estimation was spot on.
5. Any other tips?

https://www.komoot.com/tour/2849944946?ref=aso&share_token=afL617e8bT6RTtOHiM6LIU2xpeQxw5blaUusbFNOZ8Z2H4IFaB&t_s=referral&t_cid=route_share