At minimum you need 4 step. Top step flush to bumper top (29" is what we also have at bumper) will be just about level. If your bolting above bumper (under door) then a 5 step. If you went with the Torklift glow steps you can add/remove treads (they bolt together verses rivots). I have a set-cant say enough-but I also changed up to the 8" wide X 20" wide treads. The 8" treads are nice but note: tread nose to nose is the same-approx 8".
So with a std. 6" tread plus ~2" standoff for bracket-top tread nose would be about 8" from bumper, 2nd tread heel that might hit would be ~7 1/2"-8" down and ~9 1/2"-10" out from bumper. So 6" or 8" treads clearance at 2nd step & reciever end @4 1/2" cant see it being issue. easy enough to measure.
Question why does the tape measure show 30"? though 4 step still work..