My challenge (at the moment) will be seeing what inks & other work. It's been a long time & my memory ain't what it was...
LOL Daniel...your post gave me a dé·jà vu moment! Then I recalled posting your question
recently at 2 Peas...and a search pulled up my post LOL! In 2012 folks suggested using dye inks, colored pencils, memento ink, archival ink, brillance ink and heat embossing. I think the main issue is vellum warps if too wet.
As for a good adhesive I recommend Therm O Web's Vellum Adhesive Bond. It is a small hand runner.
...Jan