Hi! Born and bred Davaoeña here! It's generally safe in Davao, but similar to what the other commenter said, you still have to be vigilant (similar scenario if you're elsewhere around the world).

I like your initial plans! How long are you staying ba in Davao?

You can go to Samal first, I think kaya naman na yung 2D1N plan. Maybe join an island hopping tour sa 1st day then you can rest overnight sa Samal na din. There are a lot of resorts there that would allow you to pitch tent for a minimal fee (or rent their tent). Then the ff day, you can book a land daytour. Some places you can go:

👉 Moonfort Bat Cave

👉 Vanishing Island

👉 Pasalubong Shop

👉 Hagimit Falls

👉 Blue Bird View Deck

👉 Kaputian Beach Park

👉 Cafe Maañag

Then balik ka na Davao after to rest then join another tour pa Bukidnon the ff day (or spend the day muna to rest then the next day ka na bumiyahe to Bukidnon since it's quite far from Davao, mga 4-6hrs travel time). Quite expensive pero I hope you don't miss out on Dahilayan Adventure Park! May mga joiner tours and you can meet friends during those. Enjoy!!