34 x 9.5s are awesome.
If there is any kind of bottom, you'll have traction. They are sick in trenches and clay.
Plus, they just look right on a narrow flattie.
Check out this old (2002) video of my CJ-5 (my borther made it for his website). Mine is the CJ-5 with no top. Running the 34x9.5 swampers at the mounds. The trick is, I'm only in 2wd in the video, I blew the front dana 30 R&P loading onto the trailer, so I did the day in 2wd. Those tires are awesome