They would manage, he supposed. There was more than one way to skin a cat, and he certainly knew several of them.

Being able to communicate with each other would definitely be helpful, but hopefully they'd be able to use them without being listened to. Even if they couldn't, at least they'd have a way of listening in, in case any guards managed to catch wind of them.

Bucky simply steps near the door and keeps his eye on the miniaturized guard, away from the others, ready for when the spell wears off... whenever that is. The sooner the better as far as he's concerned.