I have a JKU and it's stock except for it has 31" tires. I was wondering how much fun I could have at Interlake with it! I've only had the Jeep a couple of months so I haven't been off roading before.
Interlake is not very developed and a lot of the trails are fairly tight for a jku. I went there with mine 2 years ago. I had fun and my jeep was a stock rubicon but there were lots of places I didn't go and a couple of places I shouldn't have. It may have been cleared out a little more since I was there but I wouldn't count on it.