Denise - since you, too, sail a lot on the Upper Delaware, you know better than anyone how strong a 1 or 2 kt tidal current is - and that it's going to reverse 4x/day. So setting an anchor from the beach sounds impractical. I'd guess best to anchor so she'll swing as the tide changes, and plenty of scope so the anchor safely resets 180 degrees the opposite way, then watch her like a hawk at slack water!
Could also consider setting bow and stern anchors parallel to shore so she'll just be stern-to when the tide is in that direction. Sounds like more work, tho.
Have a good party!