Modal verbs may be easy for native-speakers but for me (not native) choosing the right modal verb makes me crazy!
My family {may/could} go camping this weekend, depending on the weather.
You {may/could} fix the computer yourself if it's a simple problem.
We {may/could} reach our house in an hour if we hurry up.
So, Which is correct? Why? And are these questions easy for you (native-speakers)? So tricky and confusing for me.