Can truck drivers stay for there 10 hr break

Yup

They would prefer you didn't but it is unlikely anyone will mess with you if you do.

I always stay after I'm unloaded to finish out my 10. Never had a problem.

Yes u can park there for a 10 hr break

If there's not too many trucks when you're finished and you can park in a staging area for a little while

I was told no, gotta leave after unload but talked to other ppl say they let them stay