But you are right, much of the information will be skewed. However, in your case, Tidal Earthcache is still Maine's first Earthcache.
There are several caches that have been converted to different types and sizes from their original.
And this goes for teh maps as well - I only used an average, which is not perfect by any means, but from my calculations only about 1 mile off, which you could never tell using the scale maps I am using. And, since multi and puzzle caches rarely use the true coordinates, so the averages are flawed anyway. But still fun to look at
As far as the highest and lowest... There is no elevation data in the database, but I could hand edit it in... I'm Sure Sights to Behole is the highest, but what's the lowest? Tidal Earthcache?