This looks like a great project. I'm sure Workshop members will be able to provide some helpful suggestions for you. Please note that I've moved your post from the gallery to this Outdoor Living board so your question is more easily seen by members.
Let me also extend a very warm welcome to Workshop. It's fantastic to have you join us. I trust that you will receive lots of great advice and inspiration from our members for this project and many others to come in the future.
Please let me know if you ever need a hand getting the most from the site.