Occam.
1. How to paper combine a long hive...
Make a single sheet of newspaper WET with water and squeeze it out.
Gently open it flat. Drape the newspaper over the top of the last frame of the host hive and down into the hive body until it touches the hive bottom. Press the paper to the sides of the hive like a wet shower curtain. It will stick and mold itself to the sides of the hive, the bottom, and the face of the last frame.
THEN add in the swarm frames, moving them up against the host frames to hold the paper in place.
2. Combining queens.
I have always heard not to do that. One will win, but you could be left with a damaged winner. If the swarm has eggs, you could pinch the queenright hive queen, or find the swarm queen and kill her.
3. Nuc.
I agree. You could always use the swarm as a resource nuc, but eventually I would think you would want to combine it with a hive before winter. Although nucs over winter for me, here in Middle Georgia.