Freezing fruit: Can you freeze watermelon? How do I prep peaches?

[trisho.]

I have some leftover fruit from last Saturday's roof BBQ. Mostly watermelon still on the rind and a couple of peaches are starting to go bad. Is it okay to freeze watermelon? I'm sure it is, don't people make pops out of them or something? Or I could just use it for smoothies later on. If I'm going to freeze peaches, do I need to skin them beforehand or are they fine already like that?

Thanks kids.