Yeti caves are mostly found on snow isles such as snowflake,crystal and barren :)
Apparently you have to walk very slowly through the caves - one step at a time - and you won't get scared. Hope this helped :D
Walk one step at a time slowly, don't go fast, and you'll make it :D
2
It depends on the key... Information/guides for all known and available keys can be found on the link below (although you must register to see the guides).
The URL for HorseIsle 2 is under the 'Related Links'
It is impossible to hack HorseIsle 2, as well as strictly illegal.
I am not sure if there is any places in caves where copper can be found. But one way to get it would be to have a ranch and put a copper mine on it for 20,000. This will produce 30 copper nuggets everyday.
Their are 14 caves in total. Not all are mandatory to complete in order to defeat the game. View the related link below for the list of the caves.
No. Horse Isle and Horse Isle 2 are flash web-based games.
HorseIsle workbook number 2 is under the Hoof Isle fountain.
There are many good HorseIsle guides for both HorseIsle 1 and 2. Unfortunately, many HI1 guides are out of date because the game has lost popularity. View the Related Links section below for some handy links.