Married couple with two kids (ages 4 and 8) made the Alaska trek and it was simply majestic. Everyone had an unbelievably good time, despite being hit with the Norwalk Virus.
Started the trip with a two-day stay in Seattle at the very location-friendly Sheraton. We thoroughly enjoyed all the touristy stops - Pike's Market, lunch at the Space Needle, and a half-day visit to the Science Museum.
Regarding the Celebrity Infinity, here's the breakdown: