I don’t think I would wait till I got onboard. I suggest contacting RCG and explain the situation. Regardless of the fact that you are paying good money to be in the retreat it’s disgraceful that there is no accommodation to gain access to an area of the ship.
For older ships I use a Goal zero power bank by the bed to charge my watch and phone. Recharge it during the day when I’m out of the room. Seems to work great.
We are on basically the same itinerary sailing March 6th in a Celebrity Suite. While we are Diamond Plus on Royal this is our first time on Celebrity. So I’m anxious to read your impressions.
Bon Voyage