Do you see hucks decision at the end of the novellas a happy or sorrowful one? Explain reasoning.

Do you mean his decision to leave? I think it is a happy one. Huck is a free spirit unfettered by the dictates of Southern ideology. As much as he cares for his aunt, Huck can never stay in one place. He needs the natural elements and change. Huck is being who he needs to be.