If you can afford it, travel to the areas and resorts you are considering for your wedding purpose. You can explore the resort to make sure it caters to all your guests as well as your wedding needs and desires.
You can try the food, check the service, meet the wedding coordinator, and maybe see other weddings. There you can find other resorts that you prefer. If you want to get married in Denmark, then you may browse https://www.nordicadventureweddings.eu/get-married-in-denmark.
There are many legal requirements when married in other countries. There is usually a short period of time when you have to become a legal resident of the country where you are going to marry. The average is two to three working days plus all paper.
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I recommend that you use a destination wedding planner to better understand the laws of marriage in the country you are considering. When it comes to anniversaries, you can choose an official date or a symbolic date, or several couples celebrate both.
They usually celebrate small and personal for one date and do something bigger for another anniversary.
If possible, get everyone to book at the same resort. This will make your life a lot easier! When everyone is in the same place, it's easier to do your group activities, enjoy your time with family and friends, and reduce extra costs for your guests who may stay elsewhere.