There is an entire mini-supplement on Laketown (aka Esgaroth), comprising 35 pages. It is, however, almost totally focused upon the town, tho' it does include some marsh dwelling monsters for use en route.
There is no curse mechanically, but a brief mention of the belief in one. Likewise, mention is made of the darkening of the marshes, and their acquiring blighted status... but that fate, to a greater or lesser degree, afflicts all of the Mirkwood, and in fact, all of Middle Earth, as Sauron grows in power.
Pages 5-10 are descriptions and key to the City itself.
Page 17-18 is the map proper, presented as a 3/4 view painting of the city.
Pages 11-12 & 14 are new fellowship actions relating to Esgaroth.
Page 13 is coinage information
Pages 15-16 & 19 are about the annual events for Dragontide, the feast celebrating the anniversary of the death of Smaug
Pages 20-23 discuss the Marshes and the Blight
Pages 25-30 are Lake-man character generation.