SUCH a bad idea. Look at the situation with refugees anywhere on earth... Kurds, Israelis, Pakistanis, etc.
If you are right your are wrong, if you are wrong, you are wrong!
It's a Lose/Lose situation for EVERYONE concerned. It is the black eye from which the US will NEVER recover. No amount of comforts, food, medical attention will counter what will go on in those 'camps'. Bank on it!! PLEASE DO NOT DO THIS!!!!
You are assuming the tents will be on US soil? What if they are being set up on Mexican soil?