Thanks very much for all comments. I have now booked flights in 1st that only shave 1 night off our intended trip. If the extra night becomes available i will book that, but nice to know our flights are done and at least have a 13 night honeymoon in Vancouver and surrounding areas with 1st class return flights.

Now, which seats are the best in 1st. We have been allocated 5E and 5F - Our outbound flight is a day flight so i might keep these seats but as our return flight is over night, are we best getting two seats either side?