Who gets gifts?

Parents and grandparents are not given gifts unless they are contributing toward the bill. Parent gifts (typically a photo album of the wedding pictures) are given from the couple to each set. Gifts are given to bridesmaids, groomsmen and flower/ring children and those should be what you would give for their birthdays according to individual interests that are not wedding related props. Gifts to the couple from each other are vows and rings.

Gifts to guests are a great guest experience (good food, drinks they don’t pay for themselves and a good dj plus gracious hospitality). Favors on top of that are a waste of money that can be better spent on food/drinks/dj/photography.

I plan on giving both in-laws and parents a bottle of something along with a letter telling them how happy I am, how much I love my partner, and thanking them for their support and love. I'm doing the same with the two groomsmen - a bottle and a personalised letter telling them how much I care about their brother.

After the day, we will do as Michelle says and give the parents a big framed photo of us to put up.

I'm giving my bridesmaids a bunch of things which I guess are partially wedding props, but also just things to make the day more comfortable for them. So, as well as paying for the dress, shoes, hair, makeup, jewellery and hair decorations, I've got robes, wraps and stockings in case it's cold, slippers, squishy shoe pads for comfort, perfume samples, personalised makeup bags, champagne glasses with their names on them, little 'cocktails in a bottle' in our wedding colour, face masks, and this fancy pear juice that's supposed to prevent/reduce hangovers. I'll also pop something edible in there like expensive chocolates or chips or similar.

What I'd like to know, is what an appropriate gift for people who do readings or help during the ceremony?

Give something within your budget based on their personal interests.

That makes sense... I don't think I was given anything when I did it for friends! (which was totally fine!)