The pouch is just a safe way to restrain them without either of you getting hurt. You just place them in the pouch and gently pull out each foot, keeping their head secured inside the fleece. Being held securely in the dark also alleviates some of the stress on the gliders. This a completely humane method and can keep you from getting nipped if your baby objects.
Another way to go is to try offering them a favorite treat to distract them while you work on each hand. Most of my gliders do well with the distraction method, but I have one or two that are just too wiggly and need to be placed in the pouch.
Once you get them used to regular nail trimming, they should be much more relaxed about it. As long as you are not quicking them, it IS NOT painful. I would also imagine that it's less stressful for you to do it than to take them to a strange place with strange smells and whatnot and have them do it at the vet.