I know that the Star Alliance lounge (at least the business one, not sure about the First one) in CDG 1 does not have beds. Are you flying Air Canada? If not, you won't be able to use their lounge in CDG 2A (note: I am not sure if they have beds either) as you cannot access each terminal and "hall" independently of each other without a corresponding boarding pass. You may be restricted to your departing airline's lounge (or terminal) or leave CDG and try the IBIS. If in CDG 2, the Sheraton would be best as it is connected to the terminal, though it will be more than the IBIS (which is only a couple of minutes away from either terminal via the CDG VAL)