Advice for flying with 8 month old?

Randi • In love with my best friend. ❤ 5/26/18 👰🤵 Mama to the perfect baby boy born 11/14/19👶💙

My husband's family is having a reunion in Florida this summer. Our son will be 8 months old at the time. We live in Idaho so we'll be flying, our closest airport only flies local so I know there will be a minimum of one layover. I would also like to bring the stroller and car seat. Does anyone have any advice for travelling with an 8 month old? We're also staying at a beach house so I'm not sure where to have our son sleep as we don't own a pack n' play. There's a slight chance we could borrow one of his siblings' pack n plays who is driving if any of them still have one leftover from their children but we haven't even asked yet. All advice welcome!