So, I laid it out on the floor...it being the only surface large enough to accomplish this.
All was well until the two furry heathens went tearing through the RV on a game of chase and scattered the pieces to and fro.
I put it back again, only to have it demolished on the return lap of their game. Sigh.
But I persevered and finally managed to get it together.
Long Live the Queen of Determination