Now I shall try to be grown up for a minute!!
If you are going to pre book then many will tell you that Feb on is the best time, normally a good base has built up on the pistes and the weather is still relatively cold to keep the pistes in good condition, personally I would avoid half term if possible.
However if conditions are still good March can be fantastic with still the possibility of fresh snow but warmer more comfortable weather, you cant beat skiing or boarding in the warm ...
Now I shall try to be grown up for a minute!!
If you are going to pre book then many will tell you that Feb on is the best time, normally a good base has built up on the pistes and the weather is still relatively cold to keep the pistes in good condition, personally I would avoid half term if possible.
However if conditions are still good March can be fantastic with still the possibility of fresh snow but warmer more comfortable weather, you cant beat skiing or boarding in the warm sunshine, but it can be risky booking late well in advance as you can never be sure of conditions.
I guess the best thing is to wait until as late as you can so that you know conditions are good, but for many that not possible.
Hope thats more help!!