Four Squares Puzzle (WPC Style Logical Puzzles #F2)

This weekend we have "Forsmarts 9th Anniversary Squared Contest" in which all the puzzles are Four Squares. I have earlier posted the "Four Square: F1" puzzle which I created for 24Hr. Puzzle Championship 2011. Here is another similar puzzle that I created for the same contest. Hope this puzzle will be good practice for this weekend's Forsamarts Puzzle Contest.

"Four Square" Puzzle Instructions

The four puzzle types in this part: Skyscrapers, Battleships, Tents, and Snakes all rely on clue numbers on the outside of the four puzzle grids. Find the missing clues that are shared between the grids so that all puzzles can be solved, and solve them.

Skyscrapers: Place digits 1-6 into the grid so that each digit appears exactly once in each row and in each column, and the clue numbers are the number of buildings that can be seen from the corresponding direction.

Battleships: Place the given fleet into the grid so that ships do not touch each other, not even diagonally. The clue numbers are the number of ship segments in the corresponding direction. Squares marked with an ‘X’ can not contain any part of the ship.

Tents: Locate the tents in the grid. Trees and tents appear in distinct pairs, in horizontally or vertically adjacent squares. Tents do not touch each other, not even diagonally. The clue numbers are the total number of tents in the corresponding direction.

Snake: Find a path of sequentially numbered and edge-connected squares starting from 1, passing through 10 and 24, and ending at 30 (1-12 for the example). The path cannot loop back or touch itself, not even diagonally. The clue numbers are the number of times the snake makes a 90-degree turn in the corresponding direction.