Chances of getting in 'Ohana at opening w/o ADR?

[Studios94]

I messed up and made our 'Ohana dinner ADR for this coming Friday instead of for Thursday. Of course, 'Ohana is totally booked so I can't change my ADR. We are a party of 4. Is there any chance of getting a table on Thursday evening if we go to the restaurant prior to opening and ask about tables available for walkups? I figure they don't hold any tables for walkups but am hoping to hear from others who may know for sure.

Thanks!