I just wanted to chime in and say a big Thank You for the replies in this post!
I'm also a pretty fresh-baked Wrangler owner ('97 TJ) and experienced the same worry. I didn't move the Jeep for most of the snow storm here in DC but finally had to make a trip to the store. In order to maximize the chance of getting my spot back when I returned I didn't bother TOO much with shoveling and just let the Jeep do the work. Figured no 2WDs could get into my spot. The Jeep performed admirably. But when making...ehm..U-turns on the street and also tight turns in the parking garage at Target I definitely noticed something I haven't in 2H or in my previous cars - the Jeep becomes jerky and the steering wheel bucks. Sounds like once I entered the parking garage and once I was on dry(ish) pavement I should have kicked it back into 2H.
That being said - what's the worst-case scenario here? In other words, what happens when the transfer case binds up, i.e. when I take tight turns without remembering to put it back into 2H, and what are the chances of something bad happening? I certainly drive in 2H 95% of the time, unless 4WD is needed.
So, thanks again everyone!!