Unsound Unsound:
I've been there a couple times in the winter. Never did any of the official tours, but it's easy enough to do on your own. Didn't need the spikes either, just had to walk a little slower in spots. The hardest part is actually getting down to the ice, but there are several easy to spot places you can do it, particularly near the 5th bridge.
Good to know. Thanks! We're looking at doing the guided tour for the first go around. More so for the information they offer. We like field trips.

And it's only $60, so what the heck. After that, who knows.
When we went in June, the fifth bridge was out, so we had to go up to the parking lot, hike past the fourth bridge and then go back. It was nice, but we couldn't do the entire hike, which was a wee bit disappointing. I'm going to use it as an excuse to go back again.
Now we just have to wait for this cold snap to end so we can plan a trip.
![Cold [cold]](./images/smilies/cold2.gif)