L.G.
As long as he's still happy in the crib and not trying to climb out, I would move him to the new room first. I was surprised by how much both of my kids enjoyed being able to get out of bed by themselves - they both spent months getting up in the middle of the night to play. I think it will be easier for him if he gets used to his new room before having that freedom instead of changing rooms once he's already used to getting in and out of bed by himself.
If you don't already have them, you might also want to consider light switch extenders so he can turn the lights on by himself and a baby gate so he's not roaming around the house while everyone else is asleep. Our kids love being able to turn their lights on themselves when they get up during the night and my husband and I really like knowing that they can't get into the non-childproofed areas of the house while we're asleep.