Stand up paddle boards are typically for one rider. The comically large SupFlex BigSUP, on the other hand, holds up to ten. Fortunately it’s inflatable so it’ll actually fit in your car deflated and rolled, with two valves and two double action hand pumps to hasten the process and a fully rigid body once fully filled. Thanks to its 4’11” width, 18′ length, and three removable fins it’s (unsurprisingly) quite stable, and double-layer military-grade PVC plus a drop-stitch core mean it’s actually stronger than rigid foam boards. Though you’ll need handfuls of friends participating to make riding efficient, not to mention paddles for all.