I have anchored there about once a month for the past 4 years. It's quite roomy so if you find boats with loud people or music you can anchor away from them. Usually, you see 5 to 10 boats on a weekend night. Compared to another popular spot like Lake Sylvia, that's great. Never had any problem at all. The only thing I don't like is the FIU spot lights. They are very bright and aimed directly at you. I like privacy and darkness at night. So I usually anchor on the right side, away from the lights. Besides, the spot is so close to the inlet, close to the sand bar and Beer Can Island, and less than an hour from Bayside. In the morning you can get coffee and gas at the little store by the inlet entrance.
Esteban, you cannot beach the boat. There is a line with bouys and you cannot cross it. If you want that, go to Beer Can. But there, you will have to share your night with mosquitos (not always).
By the way, if you are coming down on the Intercoastal you can also go to Lake Maude. There's even less traffic there. Whatch out for falling cargo planes there!