A nice set of racks are a must!! (Talking about SUP racks, get your mind out of the gutter ha-ha)
You have expensive boards are top of your cars/trucks, if you don’t cheap out on our board don’t cheap out on your racks. We have heard and seen way to many horror stories about boards going flying. Even a lot of stock racks can be weak, really check them out if you go that route.
Otherwise Thule racks are a great place to look
Yes they are expensive but think long term investment.
All your local sup shops can help steer you in the right direction.
In Annapolis East Of Maui Boardshop is the place to go, they got us dialed in