I only dryhop with pellets. I just throw them in the keg. No hopsacks, screens, tea balls , or SS sponges. After 5-7 days, I gently lay the keg on its side, gas-in post down and slightly elevated at the bottom. Then I push the beer out the gas-in post to another keg by apply CO2 to the beer-out connector. Works for me but I don't mind the extra keg because I have a keg cleaner.
Tasty