I have not tried it yet but can't you Sync you photos to your iOS Device from iTunes and then let it Sync up to the Photo Library.
My problem is that all of my Photos are in Events and I use Smart Albums to group my Events by text in the Event Name. I do not know how to duplicate this within Photo Library. Anybody have any ideas?
I thought I was a genius thinking that last night and tried it but it doesn't work.
You get an error saying you can't sync photos through iTunes and have iCloud Photo Library turned on. You then either have to delete the photos synced through iTunes or turn off iCloud Library.