Thanks everybody! We are doing ok so far. We had him in a crate and the dogs were sniffing and wagging their tails! He didn't act like it bothered him. When we let him out he headed for an open window and hopped in. (It was 72 today so I had windows open.) He has eaten his food and right now he's in the basement snooping around, once he came up with dust bunnies on his cute lil' Pumpkin head. Dolly got a little crazy and went after him (tail wagging the whole time) so he ran behind the washing machine, but I talked to him and he came right out and let me pick him up. Other than that he has not tried to hide and seems to be adjusting ok.
Just for the record, we are not calling him "Bumpkin". He seems to respond to Pumpkin and I think it fits him so we are not changing his name.