Just secondaried in a corny for the first time, but certainly not the last! Dry-hopped in a bag, held that in the wort using a small piece of clear tubing to clamp it to the gas-in tube. Took maybe a minute to sanitize my hands and the lid, open it up and remove the bag and get the lid back on and corny pressurized! I have it under high pressure, so I plan on drinking some Monday night.
I did shoot CO2 in and vent the O2 out when I racked it in to the corny a couple of weeks ago.