He's adorable.
Even if you cannot get him to a rehabber, you can still call them for advice (just don't give them your name) explain your situation and they'll likely be happy to talk to you about dos and don’ts to prepare for release. As mentioned though, keeping him, even for a short while is illegal in many states.
The hardest part will be staying as hands-off as possible... that's why it's so much better/easier to get them to a rehabber. He will need a healthy wariness of humans if he is to survive on his own after release and it's difficult to raise them without taming them.