On sandy points google page there are details such as that. Theres a bar graph that shows how busy it is on each day of the week. Weekends were the highest. Thursdays are one of the lowest!!
I went on Saturday around 11am it was a lot of people but we found a good spot for us, remember you have to pay the entrance $5 per person.
It has long beach I went there on weekend and in peak hours Still find a decent space for my family and able to maintain social distancing If u walk a little u can easily find a good spot Enjoyyyyy
Try this: http://www.marylandhealthybeaches.com/current-conditions.php
There is a Twitter you can follow. https://twitter.com/MDStateParks/status/1284934285263351809?s=20
You may be able to call and get an estimated# of persons, but most likely it's packed, especially on the weekend.
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