What I always do is take my pictures early in the race, which means you get riders who may break down later, then put it away and enjoy the racing. I think the problem when you have a camera in your hand is you always want to be ready for that extra special moment so keep looking through the view finder but usually miss it anyway. Just a few snaps would be good but most of all enjoy.
I must admit I didn't know there was a road circuit at Jurby I will have a look when I'm over.