North OC is generally less crowded, but maybe not enough. I would find it hard to completely avoid the boardwalk, but it depends what you like and how determined you are to limit contact.
Just based on my own experiences, I don’t see the DE beaches being any better. Yes, they are smaller overall, but a lot of people crammed in. And Rehoboth, is also a partially a party town. Bethany seems to me overrun nowadays.
I don’t know what is opened foodwise. The Starboard opened June 1 (I still get emails, LOL). i think that date was the official date for phase 1 openings.
In OC, Thrashers has most definitely been opened. I’ve seen the lines on the webcam specifically trained on that line. Backshore Brewing is open (also webcam). So you’re assured of a beer and fries diet.
Overall, I would keep an eye on it. Last weekend is not a good judgement point; weekend after Mem Day wknd is always low crowds (best weekend of summer to go!). Just watch and see how things go is the best you can do. Ultimately it’s a personal choice.