I've raced on the F1 course in Montreal (on a bicycle) and it's pretty fun. The hairpins probably *aren't* made for the F1 cars to do at 100 mph-- they might be down to 35 or so, and accelerate in and out really hard.

The width of the course will be fine-- 12-15 m is huge. Standard bicycle tracks are 7 m wide. The hairpins could actually be like hairpins, but not as bad as the typical ones that get put in crits at the ends of divided boulevards. I managed to slide out in montreal hitting the hairpin too fast because it was a) raining and b) I had flatted in the last lap and had to chase back up on a borrowed wheel.

Just like any race, stay near the front but not in the wind and it will be much easier.