Sure, if its getting too dry, do anything that works. Pipe tobacco isnt as picky as cigars and you dont have to baby it like cigars, thats one of the high points!!
I have seen people use a humidor for pipe tobacco, you just have to find the humitity that you prefer to smoke at, usually way lower than cigars. I like my tobacco a little drier than some people, I like the flavor and the burn rate when its drier.