just a thought on the crate/pen screaming. He's terrified. He's alone and in a strange place. When I brought Seger home, I put him in a crate and put it right on the bed with me so I could sleep with my hand in the crate. Others have slept on the floor by the crate or IN the pen with them. He needs your nearness right now. Try that at night and see if it doesn't calm him down a bit.
Midnite at about 8 months old had issues with the crate. My son slept on the floor next to him, it did work.
Misty- Samoyed Mix, Tannor- Golden Retriever CGC
Robyn- GSD CGC, TC, Midnite-GSD CGC,TC, Brennan-Golden Retriever CGC, Batman-Husky/Greyhound , Apollo-GSD