Prima~~As others have said, you do have a darling friend and a wedding cake or pops would absolutely be appropriate for a "gift" in this specific situation.
I looked at your photos, and you appear to have the skills needed to create a gorgeous rustic wedding cake or the cake pops.The single biggest thing that stood out of your narrative was that this will be an outdoor wedding with 90+ degree weather.
For that single reason alone~~I personally would suggest that cake pops covered in chocolate are NOT an appropriate option.
Many superb cake decorators have disclaimers on their websites that state that certain flavors/frostings/fillings will NOT be provided at outdoor weddings since the heat will severely compromise the product.
Rustic weddings are the current rage, and there are LOTS of ideas for rustic, tiered wedding cakes that would be appropriate for a 90 degree outdoor wedding. Appropriate outdoor frosting/fondant could be rolled fondant or a shortening based buttercream such as Indydebis Crisco-Based Buttercream Icing: http://cakecentral.com/recipe/indydebis-crisco-based-buttercream-icing
Here's an example of a rustic cake from the CakeCentral gallery:
You can also google "rustic wedding cake" and you'll come up with lots of ideas. There are a LOT of rustic cakes on the CC gallery. You can purchase round pieces of wood that are made specifically to be "cake drums" for rustic cakes.
You may wish to gather some of the rustic wedding cake photos for inspiration and share them with your friend and explain that anything made of chocolate will melt and may look awful despite your best efforts because of the heat in an outdoor setting.
Good luck with whatever you decide!
Here's a video by Bronwen Weber showing the effects of (110 degrees F) heat on a wedding cake with real butter in the buttercream over an hour in the sun:
Here's an article about the wedding cake for the daughter of President Bush. EVEN this cake "leaned" in the heat at an outdoor wedding: