I'm thinking with how short of a time this will be set up, breakdown won't be a huge issue (just watch me be wrong, hahaha). That also means it might not be enough time for really dense plant growth unless you count algae, hmm.
As far as the plant list goes, I'm thinking some stuff coming up out of the water would be nice, maybe hydrocotyle "Japan" if I can find some. I also have some tiny anubias, dwarf lilly plantlets, and baby java ferns. No carpeting plants though, except some dwarf hairgrass that's decided it doesn't want to carpet anything.