Almost sounds like it depends on what mood the officer is in. LOLAccording to this, if the inflatable is used as a Type V then it must be worn to be accepted. Normal usage when fishing would not require this (Type V are designed for special use; the Bass Pro one's linked earlier are Type II):
Boating Regulations and Safety Concerns
Tennessee is one of the nation's leading states offering recreational waterways, and most "Volunteer State" residents will at some time take advantage of this tremendous opportunity. Any Tennessee resident born after January 1, 1989 must show the TWRA-issued wallet Boating Safety Education...www.tn.gov
thanks for the information.