Swapping the sleep time blanket, is it possible?

We are thankfully in a pretty good place sleep wise (today at this very moment) and I don’t want to mess it up but… I need to switch out his favourite sleepy blanket. Baby is one year old and I need him to start napping at his grandparents house during the day, I don’t want to bring his favourite blanket because I only have one! He currently uses a small fluffy blanket and I’d like to switch to one of the large muslin swaddles as I have tons of those. Is it possible to make the change?