Mark everyone i have seen has been with snow skis and only 2 . when I attach them i like to drill the holes though the skis from the bottom so i can drill a counter sink hole for the head of the bolts to set into and i like to use screw head bolts, just my preference and on the pro i used 2 holes per ski but will go with at least 3 on each on my Yukon which i still need to put skis on just bought it for my own X-Mas gift to me, and for the skis i think i an going to try using a pair of water skis, thinking that they mite help it ride up on top of the soft fluffy snow better than snow skis will so this will be an experiment and very easy to change back to snow skis if i need to but first i need to find some old water skis, I know that snow skis are very easy to find at any second hand store or garage sale for just a few bucks . i hear ya on the lots of gear and sometimes i ask myself why i dragged all this stuff out with me and wish i could afford a snow mobile or a 4 wheeler but thats more than i can afford so i will just keep on dragging it along and stopping for a breather from time to time .