How to handle no plus 1s is similar to how you handle having a no kid wedding. There are many reasons why a couple decides to not include plus 1s (or kids). Every guest you invite is going to have a cost associated with them. Maybe for you it is that you only want those that you know attending your wedding. Maybe you are wanting to cut costs. Maybe your current guest list is close to the venue maximum. Whatever your reason for limiting plus 1s there are 2 questions that arise.
Whatever your reason for not allowing +1s (or no kids) be confident in it. Not everyone will be supportive but if you feel strongly about it, stick to it. Most importantly, be consistent. Be all or nothing. Exceptions can be made for the wedding party but there shouldn’t be exceptions for anyone else. Don’t bend the rules for anyone or before you know it the rules won’t exist anymore.
Keywords: wedding, wedding guests, wedding budget, wedding tradition, who gets invited