Who should get corsages and boutonnières?

And the groom but that's all I can think of.

We did florals for everyone walking in the processional. Boutonnières for the groom, groomsmen and dads. Corsages for the moms. Bouquets for bridesmaids and bride. In our case, grandparents were already seated and did not receive florals.

Of course, the groom. If they are old enough (not toddler age) I have also seen ring bearers wear a boutonniere. Best wishes!

Sounds like you have it covered. I have seen guest book attendant have a corsage too, but I think that is personal preference.

We did those you listed as well as siblings not in the wedding party

I think you've got it covered. You're distinguishing the VIPs with these small floral tokens, and parents, grandparents, and any other older family member who really made on impression on your life or his life, are generally the recipients. If there are stepparents in the mix, and with our clients, that's not unusual, we usually make a piece that doesn't rival what the parents wear, but it does designate them as parental figures (and believe me, most stepmothers want that recognition).

We don't have a bridal party, so for us it wound up being boutonnières for the groom and both dads and then corsages for our moms and my godmother as "honorary flower woman".

We gave them to all and sundry it seemed

We didn't have a per se bridal party so our kids, godparents, aunts and uncles (we are older so not many surviving), siblings and Lord above knows who else!

We did bouts for fh, groomsmen, our boys and dads. Corsages for mum's and readers (our godmothers). All of our grandparents passed away.