Kinosaki Onsen 1 vs 2 Night?

Hello! I need your expert opinions!

I'll be traveling in October for 10 days, I'm on the fence about how many nights to spend in Kinosaki. Original plan was to spend 2 nights, a night each at a different ryokan for variety. However, I'm debating staying an extra night in Kyoto and just 1 night in Kinosaki.

Things I would like to try to do while in Kinosaki but not sure if I can complete with an overnight stay:

1. Rent a bike and go to the coast–Kehi beach (approx 20 min?) vs Takeno Beach?

2. Genbudo park? Is it possible to cycle or is it access by boat only?

3. Ropeway

4. Hit up all the onsens–which I know alternate. Do they all open fairly early in the morning?

5. Any other recommendations?

Thanks!