No ADRs during Easter week....that's going to be really tough. I hate to be a downer, but I'm afraid you're going to be eating a lot of counter service food. There's a lot of variety for CS nowadays, so it's not a terrible thing, unless you really want a sit-down meal.
I understand where your DH is coming from, but since they started the
DDP, the days of being able to 'wing it' are gone.
I was there from 3/18 - 3/22, and even resort restaurants were very tough to get. And it wasn't anywhere near as busy as it will be when you go.
My best advice for you:
1) Do NOT just walk up to restaurants and hope they'll let you wait for a table. Many TS places don't take walk ups if they're booked, they'll just turn you away.
2) On the day that you want a TS meal, call Disney Dining around 9 or 10 AM. I had better luck calling the same day, and taking advantage of cancellations. You're still going to have a limited selection of restaurants and dining times, but this is easier than wandering from restaurant to restaurant, looking for one that has openings.
3) You may want to consider trying to get some ADRs now, regardless of what DH says. He'll thank you when you arrive at the restaurant and he hears the hosts/hostesses turning away all the guests without ADRs.