I managed to get all my clothing (with the exception of my swants and wool wrap) into my underseater! Also my camera, one lens, the chargers, batteries and all the stuff I usually fly with. It was so cool to get to my seat and pop it into place under the seat. No trying to find space in the overhead bin!
(We gate checked R and M's bags, since it was a full flight and they offered. Since we have to go through customs, it won't be too long a wait, I hope. fingers crossed.)