Upper class family of 3 seating query

Hi all,
I hope you are keeping well in these strange times!
Myself, my wife and my son are going back to the States to visit family for Christmas (we're all citizens)... Got a few upgrade vouchers to use and so am looking at options to fly upper class for the 3 of us.
My son is 3.5 and used to flights but I'm not sure on what's best in terms of seating for the 3 of us? We've done BA club with him before and the 2 seats next to each other work out well.
However upper is more single secluded seats.... We'd be looking at an a330 300 or 787-9 for our journey.
Wondering if 3 seats in a row along the window side would be best, with him in between us? Or one of us across the aisle and one next to him?
Bit tricky as there isn't a perfect option but wondering if anyone has done it and has any tips or general advice? Thank you
I hope you are keeping well in these strange times!
Myself, my wife and my son are going back to the States to visit family for Christmas (we're all citizens)... Got a few upgrade vouchers to use and so am looking at options to fly upper class for the 3 of us.
My son is 3.5 and used to flights but I'm not sure on what's best in terms of seating for the 3 of us? We've done BA club with him before and the 2 seats next to each other work out well.
However upper is more single secluded seats.... We'd be looking at an a330 300 or 787-9 for our journey.
Wondering if 3 seats in a row along the window side would be best, with him in between us? Or one of us across the aisle and one next to him?
Bit tricky as there isn't a perfect option but wondering if anyone has done it and has any tips or general advice? Thank you