I've never flown on skis, but years ago when I was first learning to fly in Alaska, an acquaintance had learned the hard way about another pair of issues with skis, besides what's been mentioned here: hard to steer, and no brakes! I forget where he'd landed his 180, but Talkeetna comes to mind, and he was taxiing on the snow-packed runway/ramp toward a line of airplanes parked there. As he got closer, he tried to turn away from them by kicking hard right rudder and blasting a little with power, but instead of turning, the airplane went straight. He pulled the mixture, but the prop was still turning as it bit into a Cherokee 140's wing.
That was his first winter on skis. The second winter, he pulled the skis and headed down the Alcan for a family visit. Somewhere in the Yukon, at about -70F, his engine failed, and he safely landed on a frozen lake--no airframe damage. He was there for less than a day before the SAR people got to him, but by then he was in a dire hypothermic state. He was clutching his newly purchased ELT, and he wouldn't let go of it. This was the first winter in which ELTs were mandated.
Obviously he survived, and his insurance paid to have the airplane retrieved by helicopter. When he told his stories to us newbies at the Elmendorf Aero Club during one of our "safety meetings", you can bet his photos and tale of survival had an impact on us!
Cary
The only reason for putting off the ski installation of course is it means I have to take the 29's off and put the 8:00's on, and that's fine when it's WINTER and lot's of snow, but when I still have ground in sight, mostly, I prefer the fatties, those small tires looks like hockey pucks and ride about the same.