Depends on how big the nodes are. Plant them individually and cover the entire area. The glosso will grow and fill in the space...how big of a space do you have?
I unbag the plants and rinse them in the sink. I've recently started to heat up some water in a cup, add enough salt to make it pretty salty, then add it to an entire sink of cool water. I'll make sure it's all mixed in, and then dip the plants in there for a quick bath. As you gently swirl the plants around, you'll see the larger snails die quickly and settle to the bottom.
I've done this for two plant shipments and no snails yet! *crosses fingers*
Other than that, I float my plants in my tank for a day or so, longer if they don't look so good. Then I'll plant them.