Booked a flight with KLM using points on a 787. Most of the rear of the plane is selected, while the front part with economy comfort and front selection seats is virtually untouched. I have silver medallion with delta (crazy I know), but I was wondering if I want to sit with my family, if I should select seats now or wait for KLM to assign us (hopefully) to the front. Does anyone have any insight as to how this process works? Am I likely to go to the front or the very back of the plane?