Does anyone know if there is accomodation available in the area of the Sirikit lake ?

I read on this site :
Thailand Guidebook
that there are gust houses in Ban Pak Naj (last item of "attractions").
We will visit North Thailand by bicycle, and are thinking of taking the road 1047 up north, departing from Sukhothai.
Another option is the road 1237 starting from Chat Trakan, but I find no information about these two options.

I would appreciate if anyone could give me some advice !

Thanks in advance !