We have the same thing early in the season on the Dobbins Island on the Magothy. I lost count at 500 boats last year. Several rafts were damn near 1/4 mile long. Can't seem to find pics at the moment. I documented the bikini fashion for 2008!

It' been decades since I've made it north of Hart-Miller Island.
Sounds good. Looks like a I'd probably trailer my skiff...looks like a three hour run in the 'Ray.
I couldn't find the spot onthe chart. The only spoil area is SW - the other side of the channel at the mouth of the Sassafras. Details. Googled it and it came up as a rafting hot spot.