Agree with everyone- Tiffins was an amazing meal from start to finish, and we always love Y&Y.
Tiffins does take a little more time, so we enjoyed eating there for dinner and reserving a time just a bit before park close so we had all day at the park and didn’t waste too much park time eating (AK usually closes pretty early compared to the other parks).
Y&Y we usually do lunch (not Tiffins and Y&Y on the same day though). Service is faster there and it’s nice to have an hour to sit and cool down in the middle of the day. Portions are quite large at Y&Y, so easily shareable, especially if you get an appetizer as well.
Have fun!