I didn't mean when the airport is filled. I meant the time allowed for entry could be expanded so that less congestion would be encountered later. Also, an early morning arrival is more friendly to vintage with no radio. Actually the NOTAM recomendation is morning for NORDO. It could even revert to CTAF and no radio (tower closed) during 5:00- 7:30am.
Of course, ground volunteers would be needed.