The Idaho City 100 is not a qualifier for the ISDE this year because of the need to name the teams early. That won't make the race any easier or less competitve. Enduro, HH, GP, GNCC, WORCS... they are all races and you will race your way to the finish. I am no racer, but, I have yet to see the start of any of these that didn't result in flat out balls to the walls racing. You will have fun. (you don't have to race bar to bar in the transfer sections however.
Have fun, keep us informed.