I haven't skied for years and never at Xmas. We are going to Val Thorens with our two teenage sons and I'm not sure what to bring to wear in evenings? Will in need snow boots for the resort or just 'nice' boots? Should i bring something other than jeans and jumpers? Help, I've no idea what to expect! We are staying in the Hotel Val Thorens 1/2 board if that helps!