Good thought. Here it seems as if he has lost his identity but does not know what to replace it with. He is drifting in a land of no identity. Maybe, like the iguana, this is the moodiness of an unsettled state as he sheds his old skin and discovers the new? His day dreams of travel and having a place of his own shows that he longs for something more.Given the title of the book, and a possible metaphorical link between losing skin and losing identity, living without identity and in anonymity under a Causeway using an assumed name
The fact that he turns to Rabbit for help in the decision to allow Larry to stay indicates that he does have some desire for a connection, for some kind of human relationship.
The picture that life under the Causeway paints is of a type of wilderness, a wilderness in the middle of a noisy chaotic city, and the tent and eating beans out of a can adds to this feeling.