I have a brother who insists that snowmobilers are the heavy drinkers when he sees a dozen machines parked at the local watering hole. I counter with boaters are the bigger consumers. I do both, sledding and boating, so I think I've got some history on this one. He and I have had this discussion a number of times. From my experience if there's a dozen sleds in front of a bar, let's say some are there just to take a break, others there to warm up, and still others are there for the food. And yes, there's likely to be some booze flowing but not as much as some would think. Now, take a summer day on the lakes and rivers and you will see some serious drinking morning, noon, and night. Maybe it's the environment, it's summer, you're on vacation, pretty girls all around, "Let's have a Beer"!
Personally, and this is just me, I don't embibe till the end of the day. Our sleds are going way too fast with too many hazards like deer, trees, and guys on the wrong side. As for boating, have you ever tried docking and loading a boat when you're pie eyed? It usually doesn't end well though it's great entertainment for the bystanders.
They've been saying for years, Don't Drink and Drive and people still do and people still die from it and that's a shame... we can do better!