Land, rest, then an evening walk through the old town around the sulphur baths and the mosque.
Day 2
Up the Military Road
Drive north with stops at Ananuri and Pasanauri; arrive in Gudauri by afternoon and collect rental gear.
Day 3
First tracks
A morning lesson on the beginner slopes, lunch on the mountain, tubing or sledging for the children.
Day 4
Higher up
Gondola to the upper mountain for wider runs; a tandem paraglide if the wind is calm.
Day 5
Kazbegi or rest
If the road over the Jvari Pass is open, a trip to Stepantsminda and Gergeti; if not, one more ski day.
Day 6
Back to Tbilisi
Leave early and allow extra time; snow and truck queues can slow the road.
Honest thought: weather runs this trip. Keep one flexible day, never plan a flight on the same day you come down from the mountains, and treat Kazbegi as a bonus rather than a promise.