Not really my cup of tea. Travelling time is long. (Can get the Tokyo Wide pass and do another 1 or 2 trips elsewhere and you will exceed the value of the pass.) I think i only bought the bus pass (1k or 1k+ yen), can't recall which one, at the JR Nikko station.
Maybe cos i went during summer, so found it hot and unenjoyable. Not much breeze, so super sweaty walking from place to place.

V giddy also for me when taking the bus to the other areas as the road is super winding, i felt sick.
You might want to go weekdays, so it's less crowded and more enjoyable.