The morning glories are indeed annuals, and prolific self seeders. You may have a lot of small plants starting up all over the place. These you can dig up, and trade. I am not 100% certain about the black eyes susan vines, but I suspect that you will have to cut them down for the winter, and replant in the spring. I would lop the top off to about 9 inches, and see what happens. If it comes up next spring then you know you have a perennial. If it dies, then you know it was an annual. Save any seeds that have come, just in case.

The black eyed susan vine will set seeds if you don't cut it back - it is an annual in our climate - the seeds are about the same size as the MG's and black and completely round. Scatter seeds in the spring when the ground is not frozen unlike MG where MG's will tolerate fall/winter sowing. Cheers.