Which 200k?
If it's the one on May 11, there's a lot of climbing, with a few really steep grades (although the steepest is short (@#$% Cushing Street) and you won't burn much time walking it). There's often a lot of really terrible pavement. And it's a 9am start, so if you're using all of the time you'll need lights. (Especially since there's a bunch of big descents at the end that you might want/need to go fast on without outrunning your lighting.) I don't know which bike these indicate, but you probably do.
The one-way one on June 8th to Portland is fairly flat, generally good pavement (and one crushed-stone railtrail), and starts at 4am so you'll only need lights at the beginning, when people may still be in a big pack.
The overnight one on July 27th is mostly good roads with a couple exceptions, no super-steep grades but a lot of gently rolling terrain, and obviously you'd need good lighting because it's a night ride.