I (and others) have installed 33s and had to trim almost 2 inches off of the cladding, but it's all underneath so it really isn't obvious.

This is the only pic I could find with a semi-close-up. As you can see, if you cut the cladding in a nice sweeping arc, it looks fine. Again, my tires measure 32.8 inches, so you probably wont have to trim as much.



As far as offroading goes, the fronts don't bottom out at all, it's the rears that rub in my experience. Try it out, if it rubs, lower the rear bump stops an inch.

Good luck,
Brian