For attaching HO scale lumber, I use the Gorilla Glue (CA glue). That is what I use for almost everything. Sometimes I reinforce the joints with JB weld epoxy, if I plan on keeping the model for several years or moving the model around.
The reason for using this glue is it makes a tight bond and works quickly, so I don't have to worry about the pieces shifting after the 60 seconds. I usually apply a small amount of glue to each surface.