Crowded beaches are a factor of parking. Neither MB or BSV can park enough to get crowded, but MB provides a lot more beach furniture (umbrella, chaise lounge). MB can get crowded at one end on weekends because the bar presents music and serves food and liquor on the beach, but one can just stay on the other end.

I've been home for a while, I only stayed 2 weeks, I would rather be there with all the quarantine rules here in RI.