Be very careful going into Marine Stadium. Stayed there twice with 6'5" draft. Coming out the second time ran hard aground.. couldnt get off and had to be dragged off by Sea Tow.... using the Halyard
to heel the boat and bounce it across the hard sand shoal. The wierd thing is I felt I was taking the same course all 4 times in/out. I dont know exactly where that sand hump is... but it's out there....
To pick someone up maybe off Dinner Key or even over at Bill Baggs Park (no name) for free anchorages
Biscayne Channel should be fine for you.