I thought that it might be useful for race fans coming to Montreal to read what an experienced fan takes to the track to help get prepared. Every year I get more stuff that I can't do without but some things are really essential. I sit in the front row so the cars come past me about five metres away. So the number one thing to pack is something to save my ears. I can't stand ear plugs. They never stick in my ear properly and after someone has finished talking to me I can never get the damn things back in. For that reason I bring along ear muffs which I find way better. The seats in the Grandstands at Montreal are terrible solid planks of aluminium. You will get a sore ass if you don't bring a cushioned seat. I got one for about $10 a few years ago and I would say it adds 50% to the value of your ticket. If you spend three days trackside, the likliehood of getting a dump of rain is very good. Umbrellas are no good unless you are in the back row or happy to make enemies of everyone behind you. Some people bring those cheap ponchos but they only keep you 50% dry in light fog. I have a good quality rain jacket and after last years downpour I got myself some good quality rain pants. Both of these survived a weekend at Spa so they will stay forever in the race bag.
There is the other usuals: sunscreen, sunglasses, hat, ticket holder, camera, water, and lunch that everyone should bring. One good trick I have is that I freeze two small bottles of water overnight. This will keep your beer cold for a while and as they melt you will have a cold drink to keep you hydrated just enough to remain conscious.