I seal mine after dark and move them either that night or in the morning. Just make certain they are very secure so there are no mishaps. Good ratchet straps are the ticket if you are moving many hives.
I've never had the need for netting.
Some beeks don't even seal the entrances and just move them after a little smoking after dark. I don't like this idea, you never know when you may have to make a pit stop where lighting would have them flying.
If you don't want to seal the entrances, then netting is necessary.