Upvote:2
Bank statements will be overkill. IOs know that all of the documentation for your situation at home has already been scrutinized before the visa was issued, and they don't have time to start second-guessing that.
The single most important factor to smoothen the landing interview as a visa-bearing tourist is to act and look like a tourist. If you can explain with confidence when and how you're going to leave, where you're staying, how you will get there, what your plans for the visit are, and so forth, most of the potential trouble is already overcome.
Tourists will generally be expected to have some paperwork with them regarding their return tickets, accommodation bookings, and so forth. There's no need for accommodation to be pre-paid if you have the means to pay on arrival; either cash or an international credit card will do.
If your purpose is something else than tourism, having your story straight is still the most important factor. In that case, it may or may not be natural for you to have something that documents your purpose -- but that will depend on what that purpose is.