Here is the confirmation on Battakundi bridge incident: Tourists banned from visiting Lulusar Lake, Babusar Top - The Express Tribune
There are no other (family) hotels in Besham other than PTDC. Try to book your room in advance.
Also, KKH from Dasu to Chilas was in very bad shape (I traveled in May this year), but I've heard they have been patching it lately. Not sure about now, but it took us almost 4 hours to travel 40kms between Dasu and Shatiyal. Ask locals if you plan to travel on KKH to adjust your estimates.