Re: Whole milk or Formula?
Does he still nurse during the night, too? If so, I probably wouldn't worry about that last feeding before bed. I was lucky that when we started solids & a bedtime routine (not that he was taking many solids . . . ) my LO would nurse, eat dinner, then bath, brush teeth, books, etc. before bed. (and since he NEVER took a bottle this gave me a good 4-5 hour window if I needed it to do something!). He would usually want to nurse again right as I was going to bed (sometime between 11 and midnight-ish).
I'd suggest trying it one night and just let your DH put him to bed without that last feeding and see how it goes . . .