The altisurfaces are way more interesting! Some of them are a bit hair-raising....
You should be able to do the rating in your own aircraft with a bit of pre-planning. If you join the AFPM, they can provide you contact details of instructors.
If you're coming to the Alps, and can make it to France for a day or two, I'd be happy to show you around some altisurfaces in a Jodel or a Rallye. (Cubs tend to bounce a lot when I land them...
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I've got the rating, but not the ski-rating. Hopefully I'll be able to add that in the next few weeks, if the good weather is kind enough to come when I can take a couple of days off work.
By the way, the altiport that I forgot before is La Motte Chalancon, which I haven't yet visited.
This site has some pictures and descriptions of a few altisurfaces. It hasn't been updated for ages, unfortunately, so some of the links don't work.