Congrats on your new gliders and Welcome to GG!
It is dangerous to not cut toenails because they can get stuck and actually rip a toe off trying to get free.
If you have them in a sleeping pouch in the cage, that will work ok too, Or a large piece of fleece to wrap them like a "burrito" so you can grab out one foot at a time. You just want to be in an enclosed area so if they get out, they can get lost in your home.
See the video links below...
Waiting to trim nails until they are "bonded" is not realistic. Some gliders are friendly and it doesn't take long at all... to some that may never like to be handled.
Putting them in a bonding pouch while they sleep on you is more for you, yes they will get used to your sounds, voice and smell but to become bonded to you it really takes play time with them for them to decide if they trust you and want to hang out with you.
While trimmer tracks in the Stealth wheel and the Raptor wheels are great...they do not replace the need to trim nails. You just hopefully won't need to trim them as often.
Trimming nails during the day when they are very sleepy and using a favorite treat like a meal worm or vanilla yoggie helps a lot too.
here are some great videos to help you get started.
https://www.youtube.com/watch?v=aWIR5hjuS-E
https://www.youtube.com/watch?v=j_2-wCceM-s