I have but one workbench, and it has to do all kinds of things. I'd love to have a dedicated reloading bench set up all the time, but I just can't. Here's what I do:
I drilled holes for the press, and I use bolts with wing nuts to hold her down.
Everything else: powder dumper, bench priming tool, primer pocket swager, is mounted with through-bolts on pieces of 3/4 inch hardwood. I use a large c-clamp to attach these to the bench as needed.
If I knew how, I'd attach photos, but you get the idea. This takes minutes to set up and tear down. I actually prefer to set up and tear down as I go; in other words, when I'm through priming, I unclamp the priming tool, put it back on the shelf, and clamp down the powder dumper.
Works for me. Any alternative ideas for non-dedicated benches?