No, it’s not necessary. You don’t need the best men or bridal party for a wedding renewal. But if you insist, then have it your way. It’s all still beautiful.As for guests, it all depends on you. It could be a very intimate affair with just the two of you and the officiant. You may also invite family members and up to fifty guests. And for couples who had a small wedding, well you could just invite everyone you know.