At the posted coordinates, you will find a large white sign that has the necessary info below. You don't even to need to leave the water to do this multi.
Cache is at: N45 AB.CDE W93 FG.HIJ
- A = How many trees are in the circle
- B = How many words are underlined in the entire sign
- C = How many commas are on the entire sign
- D = How many words are in the small, right-justified, small block of text
- E = How many Xs are on the entire sign
- F = How many non-green words are in the circle
- G = How many words in the circle plus how many bolts attach the sign
- H = How many WORDS are underlined times how many LINES are underlined
- I = How many letters are in the largest (font) word, minus 1
- J = How many posts are holding up this sign
Please note - this cache is in a potentially dangerous location and seeking it is done at your own risk! Legal entry points (PWAs) are provided, other entry points may be considered trespassing on private property. The terrain rating reflects the need to travel a significant distance on water. I strongly recommend against doing this one during winter, I doubt the ice would ever be thick enough here.
You should also know that this island is owned by Anoka County Parks Department and they only allow geocaching during normal park hours, which is 6AM until 30 minutes after sunset. However, it is possible to gather the necessary information without landing the island.
You can validate your puzzle solution with certitude.