Understand that there is no "town" on the Placencia, peninsula, just two small villages, Placencia village and Seine Bight village.
Blanaceanux's Turtle Inn is the cloest "nice resort" to Placencia village. Next closest is Kitty's and then the one-suite but very nice Mariposa.
Rum Point is just north of the airstrip, and then coming into Seine Bight there are several resorts including Robert's Grove (easily the best of the penisula resorts), Miller's Landing and Luba Hati, which may or may not be open this fall.
Belize First http://www.belizefirst.com/