I do something similar, where I use hyphens to delineate ideas and sub ideas (table-striped) but use camelCase when one of the class parts contains multiple words. (form-addUser)

This also plays well with my IDE which splits word selection on a hyphen, so if i want to change form-addUser to form-removeMonkey, it's just a single selection, where as if it was form-add-user, I would have to actually drag to select the text.