Spectators are always welcome at disc golf events. Find yourself a spot in some shade out of the flightpath of any of the fairways and have fun.
You really should enter the event as a novice. It isn't that expensive and you'll learn alot, meet new golfers and have a blast...
Most dg tourneys have sign up starting around 8-9 AM and then have a players meeting around 9:30 then start at 10 AM. This is almost always the case unless advertised differently.
Have fun...