yes Larry does get exposed by this lady he meets at the Larry fest. this lady forgot her toothbrush so Larry generously gave her his unused toothbrush. some little time past and that same lady figured out that he was Larry.
Neither the book nor the website give a list of his possessions. But here are a few:belt, Ganesh statue given to him by his mother, The Lorax, Walden, laptop, camera, boots, watch, socks, t-shirt,...