Do I need cycling shoes on my trip?

Hi!

I'm hoping to cycle 320km through the North of France this May over 4 days on my mountain bike. I used to do a lot of mountain biking but have left it out for a while now. I'm getting back into it and have seen some people suggest cycling shoes. I'm wondering would these be worth it for this kind of bikepacking trip? I'm unsure on what shoes to wear. If basic trainers/sneakers would be ok or whether there is a specific type of shoe if anyone recommends.