I usually have a high-carb, high-protein shake, and do a slow 15-20 minute walk on the treadmill after quads. And I make sure to drink lots of water before, during, and after the workout as well.
I'm gonna sound like an old fart here... A couple of decades ago, back when I was in the military, I'd spend a few weeks here and there at another base far away from home without a vehicle. The base gym was several miles away from where I stayed when I was at that base. It would take me right at an hour to walk there each way. The hour-long walks back those nights after training legs were brutal.
I don't know if I could do that nowadays - just walking for an hour straight in and of itself is enough of a challenge.