I definitely can answer your question, I stayed there once, a few summers ago, I believe it was labor day weekend. It was hot as blazes, so I have never returned in
the summer , but I had no problem being a solo traveler at Alfreds.

It is run by a great family, that watches out for everything very closely. The music situation is different ,as it's wrapping up earlier these days, and theres really only a couple nights
out of the week, there will be music.....
The rooms were fine, I didn't have ac, but had fans, so I would ask ahead of time, although February is the best month for nice weather, it can actually get cool at night, so that might not be a problem for you.
The owner even let me keep my valuables in her safe, as they live on property.
As it looks like you already know, the food is great, don't miss the fish and chips........Rudy makes the best rum punch around, and the beach area is nice.....
Theres usually a volleyball game going that your son might want to get into, and I would suggest to bring floaties, as they have a floating dock, and it's fun to float, or swim out
and lay on the dock....
I think you will be just fine...