I think half my job will be convincing her that eg "favorite ted" does not mean her ENORMOUS cuddly red dragon, which would take up her entire luggage allowance on its own! :lol:
And labelling everything of course. :lol: It's as bad as starting school! I never thought I'd be grateful that DD2's school are such label-nazis - but I can sew a label into a pair of socks in about 30 seconds now. 
OK, let's see if I've got this right...
She needs to be delivered to them in ski gear and snow boots. Ski gear comprises thermals, thin fleece, scarf/choob, hat that will fit under helmet, gloves-on-a-string, goggles round neck, salopettes, ski jacket. They will shovel her in and out of ski boots and helmet. Should be carrying a rucksack, containing spare socks, pants, gloves, teddy (the smaller the better), snack, tissues, slippers.
Possibly I should have bought a larger rucksack. 
Where does the "snack" come from, in practice? Is it an apple grabbed from the buffet at breakfast, or something bought in the village, or do you have to half-fill your suitcase with boxes of raisins?