Re the design: the thing is, the elevation looks like a zip code, especially with the word "zone" there. So I like the concept, but this design may be a little confusing.

Re the family: I read on either this board or the other that (1) they had two small children plus a 10-month or 1 year old in a carrier (amazing to me); and (2) that they made it out, although no details were given. (I was concerned after reading about their rental car being there, and rangers asking about the family; someone did write that they heard the family made it out.)