I would argue Gandalf uses not smooth talking, but fast talking. He does whatever he wants before the hobbits have even mustered up the indignation to say no. That's what happens at the beginning of the Hobbit. The book says most of the respectable hobbits hated Gandalf and only the children and the adventurous liked him, and nobody respected the adventurous hobbits all too much, Bagginses and their wealth not withstanding.