If you have Illustrator, and know how to use it, then just use it — just view things in outline mode and check / adjust as necessary before saving as an SVG. Load the SVG into Carbide Create and done.
Once you come up against limitations in Illustrator / Carbide Create you can try something else based on what the limitations you’re encountering are.
I believe there’s an Adobe product for the iPad which is based on Illustrator and which you get a license for for having the most recent Creative Cloud version of Illustrator — let us know.