Congrats! On the wedding!
My wife and I have been to disney a few times and love it there!
We have stayed at the Pop Century and we love it there but lately we have used the 3rd party DVC stores get into a moderate hotel for cheaper prices. The fell in love with Old Key West resort and we are going done in September this year. I don't know what your hotel will cost in 2018 but right now our room rate is $167 a night vs Pop at $147. It is a little more expensive but we loved that is was quieter there and they have hot tubs and they have a boat ride that you can take to Disney Springs. That is always nice on a clear night.
I know you said you were on a budget so the extra money for the other resorts may not be worth thou but it is something to think about as you are over a year away.
One word of wisdom that we have found over the years is there are always discounts on the hotels but not the tickets so we always book the hotel room only and buy tickets later. We do this to try to take advantage of the travel offers disney has. IE 25% off room rates for dates A to B. They do have special offer for packages as well but we always found this cheaper.
Another world of wisdom is watch your booking dates and plan everything to a T with plan A and Plan B. I always make sure I know I have be online at X oclock to get restaurants on this date and x oclock for fastpasses. Also when booking rank your restaurants 1-10 and book your must restaurants first regardless of which night they are on your trip. Or the hardest reservation 1st (which is usually O' Hana). Dont book day 1, day 2 etc. Book and fill it in. If you miss IE Sanaa on your first try usually it will open up but Ohana's may not.
As for a must do if you have never been it is the Halloween Party. It is worth the money because the magic kingdom is decorated in my favorite holiday and they have special shows, parades and fireworks. Although tickets are usually easy to get you are planning one of the busier times for the Halloween Party so if you want to go you should tickets as soon as they are on sale. This years Halloween night sold out fast. We have done the dessert party there too but it is not worth it and it eats up too much trick or treating time.
We have never tried the dining plan basically because 1. you can't get the
free dining plan unless you buy the disney packages 2. We thought it was too expensive 3. We won't eat that much food.
I don't know how adventurous you are with food but these were our best restaurants;
Be our Guest or Cinderella's Castle @ 8am - Both are good breakfasts but they fun. You get into the park and you can enjoy a little lighter crowd after a breakfast. I like the castle better but my wife liked be our guest better
*Dinner is nice at the Be our Guest but I wouldn't do it is again. It took up too much park time.
Sanaa in AK resort- They have a bread service that is awesome and we had the lamb shank which was fell of the bone good.
Jiko in AK resort - One of the best meals had in property. We had apps, wine and fell meal. It was a great meal
California Grill - This is place that we went to watch the fireworks outside the park (BOOK EARLY FOR SEAT AT FIREWORK TIMES). This was a good meal better than anything in the parks but we found it is a bit expensive.
O'Hana's - Buffet and a good one and also a great place for fireworks too. Book early too for firework hours because you will need to wait for your reservations too. IE Fireworks at 9 book for 8-830
Trader Sam's is an excellent place for a drink but every hard to get into because it only seats like 20 people but the patio as the same meal with non of the atmosphere. The patio is good place to spend a night thou it is still very nice.
Italy's Tutto Gusto wine cellar in Epcot is a good place for a glass of wine and an app.
The food in Mexico is pretty good in the quick service and the restaurant.
Beaches and cream is a great place for milkshake or ice cream
My wife and I try a lot of the food and quick services. Usually because we attend the food and wine festival each year. We also like checking out the resorts. We have stopped in a patio for a bottle of wine and nachos on the broadwalk...excellent afternoon.
I would never till anyone not to do something at Disney because I think you need to try everyone at least once there because I may not like Tony's town square but it maybe your favorite. The only thing I would say about the restaurants is you need to make your own. If you walk by Rose and Crown in epcot stop in for drink and snack. You may love it and comeback for dinner on another night. My wife and I's best meal of all time was buying corn dog nuggests & fries at caseys and sitting to watch the fireworks.
Just remember it is your vacation enjoy it with your partner no matter where you are for dinner or walking around. You never know your best meal or memory maybe just sharing popcorn with your partner on the stairs of Cinderella's castle watching the parade!