Great project Jerrod. As soon as I saw the box taking shape, I guessed correctly where it would go. Over 2 years ago, I told Nancy I'd do something similar as that's her side of the bed in the Ashland. Well, that project won't get done as this may be our last long trip with this coach.
And for those that read this thread and review this project of the 102 others you've done, while any given project may not apply to them, it's the inspiration it generates and that DIY spirit that it may unleash in them.
Well done my friend!
As for power, you may have AC power in the closet where your Dyson vacuum plugged in - that's that's a fairly easy AC-grab. For DC, I'd run straight up the closet wall, then across the inside of the top frame to the door side, then down into the wiring chase in the storage bay and pick power under there or at the DC panel. Have fun!
On edit: Consider grabbing DC power at the LM365 sign circuit behind the dresser. Easy peasy!