SK
Bear in mind that the site authorisation expires 6 months after your last landing, and if you are going to be flying to sites like Courchevel, you really want to be in current practice. I wouldn't recommend arriving there more than say 3 months after your last landing at a mountain airfield... you really do risk getting something wrong and breaking the aeroplane.
Mountain flying isn't difficult, but as with aerobatics or instrument flying currency is essential.