Be warned about trumpet vine (Campsis radicans) that it is considered invasive in most places and will grow to the point that it could easily pull your fence down.
I was also going to suggest something like morning glories, Cypress Vine or Cardinal Climbers, moon flowers, until you decided on something more permanent. For annuals, they all grow extremely fast and as stone said, the Cypress and Cardinal will be a hummingbird magnet.
