To find one’s way from the Hawk Channel to Marina Del Mar, you must run the marked and charted channel to what I call the Key Largo Canal, north of Lake Largo. Marina Del Mar has always struck me as a bit on the touristy side, but, on the other hand, it is one of the few facilities on the Hawk Channel side of Key Largo that offers transient dockage.
A good place to spend the night would be Marina del Mar. A little pricey (3.00 per foot plus electric) but a very calm marina and lots of stuff to do within walking or biking distance. Home to African Queen (boat used in Bogey movie of same name). There are 3 pools on site, two restaurants (Coconuts also has live entertainment weekends, and good drinks and bartenders), and a continental breakfast comes with the slip. Showers at two locations depending on what side of the marina you are on, and both excellent. Laundry facilites as well
Best local restaurant off site would be Ballyhoos about 2 miles south of the marina.
My normal morning activity is to get up early and watch all the fishing and snorkeling boats departing the marina. if you do want to snorkel or dive, Molasses is best and closest, and best time to go is between 11:00 and 1:00 (the commercial boats have all returned to their docks prepping for afternoon run).
If you decide to go talk to Candi, the dockmaster, and tell her the captain of In-T-Mate recommended the marina. No financial advantage for me, but it gets me good points when i do show up, and I stay there a lot.
Good luck and smooth sailing.