Do not worry about safety here in the Town of Samana, it is very safe.
I have been living right here in town for over 2 years.
Regarding the Bridges to Nowhere of Samana, back in the 1980's there was a small Restaurant/Bar operating for a while and now only the structure remains. These remaining structures are located on the last part of the Bridges on the Cayo Vigia island. Besides that, there are a lot of sitting areas with cement benches.
I actually go there every morning to walk... ( bare foot ! ) its very quiet and beautiful.
Yes, it is a shame that the local mayor in town is not taking better care of this Samana icon.
Every 3 months or so, they send a cleaning team over to clean the place up... it helps but doesn't last, it gets littered with stuff quite rapidly.
We still love very much our famous Bridges to Nowhere, they are part of our scenery here and they are the icons of our small Town of Samana.