Can I transport my small compressor and nail guns in the underneath compartment of the bus?

I am uncertain about a concrete answer to your question, Juan. But, there was certainly enough space for what you're wanting to transport!!! I'd give them a call, or perhaps an employee will see your question!!! Good luck 👍

I'm not sure but I don't see why not. I would pack it nicely in a box, like you were taking it to the post office and address it like you were going to mail it, with your name and address. Hope that helps.