I have had my set of Anderson chocks for about six months now, and thought I would post a follow-up for those who had questions about how well these things work.
Short answer is, they work great. With a large(ish) bubble on the front of the camper, one person can level the camper up in an unbelievably short amount of time. It's so easy, I often feel like I have forgotten something. The units are beefy. If you think they'll save weight over wood, you'd probably be wrong. But they do clean up and dry better and faster than wood, and I am confident these things are built to last longer than I am. They are as wide, or slightly wider, as the tires on my camper, so no worries about sinking into the wet ground. If the ground is that wet and soft, I'm going to have problems on both sides of the camper, and probably should find another place to park.
Not much else to say, except to emphasize how easy they are to use, and how safe/effective they are. Here's a photo where they are visible from the back side of the wheel. You can see that I am parked on a very steep slope (my driveway) where my camper has endured the harsh winter with winds that threatened to blow the roof off my house, and the camper was rock solid. They may be pricey, but I've made more money since buying these, and don't miss the money I spent on them at all.