What do we wear to my reunion?

Has anyone been to a HS reunion?
My 10 year is in a few weeks & it is a buffet dinner at the Melville Marriott. (I think)

I have a brown flower print silk coctail length dress that is too low cut for my wedding rehearsal, so I was thinking of wearing that.

Should FH wear a suit? Or just a jacket & tie, or more casual than that?

DH had his last year... I wore a 'flirty' dress, that was black shimmer netting over rayon with a criss cross neckline & a 'flirty' cut skirt over rayon...DH wore suit pants, a summer sweater & a suit jacket...no tie.

ETA: that dress sounds fine!

Really, no tie?

I figured that was a requirement, but unless the guys from my HS changed drastically, a tie is probably not neccessary.