Nothing hard about that catch without a vacuum.
Same here. Picking up a large bare handful of swarm bees is a feeling like none other. All these plump little bees being scooped up is really a treat to experience. It is about the only, "warm & fuzzy" I get about beekeeping. Don't get me wrong, I enjoy what I'm doing but, I don't use it as my, "get back to nature/hectic stress reliever".Well, apparently some do use vacs for swarms. I'm like DSemple - I use them only for cutouts. Swarms get handled, literally. I scoop them up a bit at a time and put the into the waiting box while searching for the queen. If I find her, I cage her in a clip catcher and rubber band the clip to a frame. Then close it up and wait until dark.
Oh, almost forgot: for the OP - I recommend the robovac. Just don't paint the sliding lid or get paint in the grooves for the sliding lid.