I'm waiting for Doc (aka Roatanman) to weigh in.
I read the first post yesterday. Besides answering the basic geographic questions as to beach availability, I looked at another aspect of the inquiry.
"Safe for a single female". Twenty five years ago, no single female was safe if I was there, but that was then, this is now.
The question might be in reaction to the internet's ability to distort issues. Honduras also has the notable historical and inaccurate legacy of being a current (or past) war zone. Something about Gorillas, but alas- on the Bay Islands all you get is a pesty monkey.
To date, in terms of "safety", the crime that has been perpetrated on tourists has been extremely limited. Most crimes beset longer term guests. Property crime does exist, so don't leave your I-Pad unattended, but personal crime... assaults? That's a rarity.
This advice may change in the future, but staying at an established resort/guest house, staying within tourist zones during "appropriate" hours... I really wouldn't be too concerned. Note that I did not say, "walking along a desolate beach", "driving across the island", "walking back from the bar at 2 a.m.", stuff like that.
Roatan and the Bay Islands are no different than anywhere else. If you tempt fate, if you stop acting like a good little tourist, if you seek out trouble... you are more likely to find it.
If you have to have a beach, the one at FIBR is about as safe as it gets. Lots of "nieces" being observed there topless sunbathing. Not a high threat level (best of luck on being their "Omega Test", during their last week of operation). CCV is even substantially more insulated, but alas... crap for a beach. The nicest beach is at Alligator Nose, but absolutely dismal resort options.
After a week in the isolation of FIBR, you might enjoy West End. Just use your own brain- I'd worry more about trouble from the guy from Ohio who's there for a week- and that can happen anywhere.
It's funny- people often fret and ask about crime- yet they pay money to expose themselves to monkeys of dubious health and deportment... like the ones they have at Fantasy Island