I also book cathay holiday thru agent and stay at Acacia hotel, 6 days 5 nights. I am also planning the itinerary. Apart from the spots in Seoul, I will also to get to 南怡島. I am considering if I will go skiing with my girl (to hire a coach). Will you ski?
By CX ar. Set off in the morning and return at evening. Still waiting for confirmation of air ticket. The flight period is right before the peak season and hence the price is lower.
I may join some 1-day local ski tour (say to Bear Mountain) to learn skiing.
Let's exchange more when your and my itineraries are fixed.