A walk-up is required for Seasoned, it's not for Finished. I haven't seen one in Finished yet, although I'm sure there are some, I've done a walk-out poison-bird in conjunction with a blind, right after a triple (the judges are inventive ).
Seasoned is a Land series, Blind, Water series Blind, Diversion, Walk-up and they usually try to place it all together in a gauntlet; so you don't have to re-leash your dog (which is required if you have to move to different points of origin but a pain when you have to deal with a gun & a wild seasoned dog)
Finished is usually a Land series with Blinds, and a Water-Series with Blinds. Diversion in there and an Honor. You get it all done it one day which is nice. I've seen some tough marking series in HRC, even if they are somewhat shorter, usually thick cover, most birds require a tight hunt and the blinds influence a lot (a hot blind or two makes it even more fun) .