Isabel -- I loved your images of Ricky, Louie, Barney etc., and then finally looked at the images that you asked about.
Don't know how much experience with Photoshop (or whichever program you use) you have -- so if none of this makes sense, just YELL, and someone can come up with a different method.
Since you did capture the sky color in some of your images, I would just open up one of those images in Photoshop and use the color picker to catch both the darker and the lighter hues of the sky for your foreground/background colors, then open up an image that needs the sky added. (You can now close the first image -- keep both the sky colors in your color well.) Add a new layer (below the wedding image) and use the gradient tool (set to Foreground to Background) to add the sky colors you captured from your first photo by running the gradient across it from top left to bottom right (trying to catch the actual color change in the sky).
Go to the layer with your wedding image, and select the washed out sky areas (using Color Range or the wand or whatever you prefer to use.) Be sure to catch the areas around the arbor - in between the leaves, etc. (I mention this because I did NOT catch them on my first try

) Then you can use Edit->Clear to remove the white sky and reveal the bluer sky below. Merge the two layers and save.
OR....
If you're familiar with Layer Masks, you can do the first steps as above to select the washed out sky, then do Select->Inverse and add a layer mask to the top layer -- which would mask out the washed out sky to reveal the blue sky colors on the layer below -- this would let you make any needed corrections to a wisp of hair, the woman's shoulder, etc.
An example of the change: