Reward availability to NY

I’m planning a family trip to NY and DC next year (Oct/Nov) for 5.
I’ve got loads of miles so looking to get 5Gs over the next few months.
Plenty of availability at the moment, planning NYC out and IAD back.
IAD return route seems wide open but at the moment the only NYC flight with more than 2 Gs is the 8pm flight which is a bit late.
There are so many flights a day now to NY. The 2pm one seems the best.
Which are the most popular times? Assume these will be the hardest to get Gs on?
Was thinking of getting 2 Gs at the moment and trying to pick up others later?
Any advice appreciated.
Thanks
I’ve got loads of miles so looking to get 5Gs over the next few months.
Plenty of availability at the moment, planning NYC out and IAD back.
IAD return route seems wide open but at the moment the only NYC flight with more than 2 Gs is the 8pm flight which is a bit late.
There are so many flights a day now to NY. The 2pm one seems the best.
Which are the most popular times? Assume these will be the hardest to get Gs on?
Was thinking of getting 2 Gs at the moment and trying to pick up others later?
Any advice appreciated.
Thanks