Etiquette Snob here… lol
Vow Renewals have changed drastically in recent years… and in a GOOD Way… YEAH !!
And part of this is no-doubt that with Divorce stats as they are… the concept of Second Marriages OR celebrating ones that are alive & kicking is a lot more acceptable.
Traditionally they were done if the couple had gone thru a very hard time in their marriage… like overcoming a severe illness
OR at a SIGNIFICANT Milestone Anniversary… 10, 20, 25, etc.
Nowadays, people do them for a variety of reasons…
It can include the above… or it could be that they didn’t have a BIG Wedding this first time… or they want to have a Celebration.
There is NO RIGHT OR WRONG in this regard
(Just that it is considered incorrect to have any of the Pre-Wedding Events that one would have to mark a first Wedding… such as a Bridal Shower – Bachelorette – or a Registry)
Once upon a time, the Traditonal Rule was that a couple doing a Vow Renewal would only wear Bridal Wear if it still fit from their first marriage… otherwise the go-to for both Bride & Groom was a suit. Most women choosing an Off-White, Ivory, or Cream…
Nowadays, Vow Renewals aren’t that rigid in this regard… infact Couples can choose to mark it / celebrate however they like… Formal / Informal – BIG / Small – or Wedding-like or not
So ya, Printed Invations – Wedding Dresses – Attendants – Flowers etc. They are all ok.
As for attendance… truth is, even if you Invite everyone you had the first time, atttendance will be lower. Some people just see it as another Party and opt out, tho they never would for a regular Wedding.
And some people, just see them as frivolous… or even ridiculous.
To each their own.
Hope this helps,