Best way to save and recall patcher states?

I am building a patcher that reads in 3 video files, and plays them in sync. I want to save the names of the files, so that whenever the patcher is re-opened, it will recall the names of the files that it last ran with.

I'm thinking that I need to check a slot in a pattr, if it is empty put up an opendialog, and put the result in a pattr. Then use pattrstorage with a loadbang to get the info, right? Or does pattrstorage do it automatially?