Hey!
I applied to 3 and got rejected from La Salle and University of Maryland on Monday and got accepted into the 3rd one today! Thankfully it was my top choice, West Chester University.
Anywhere between 4-8 is a good number, any more or less is either risky or wasting money on too many applications
Honestly 3 was risky... imagine if West Chester told me no.....
You have a good number! Just make sure your programs are all accredited. I believe Francis Marion is not accredited. Gallaudet is a school for Deaf students, and I have heard that people don't usually speak there, but rather sign to communicate. I am not sure of your situation so this school might be the one for you! It is something to consider and definitely research, maybe what I heard is no longer the case. University of Maryland I believe is super hard to get into, which I have heard from other people and have personally experienced. I have never been to the campus. I don't know your financial situation, but University of Delaware I believe is very expensive compared to other schools, at least last I knew.
Good luck on applying! It is painful at times but the end result is just so gratifying.