Involving Adult Children/men

I'm getting married in December, this is our second time around for the both of us. We are having a small intimate ceremony only 50 people. I'm having my father walk me down the aisle ( I eloped the first time) and I have two grown sons (24 yrs old & 20yrs old). I am having both of them walk me to my father and my Dad will walk me the rest of the way. He has two sons ( 22 yrs old & 20 yrs old), we are not having a bridal party but I would like for them to be involved too. Any ideas or suggestions?