Carswell returned Sunday from his official trip down in Los Angeles, and he came away thoroughly impressed by what USC showed him.
"I would say that USC is better than Cal," said Carswell. "Everything at USC was more relaxed. It just went great. Vidal Hazelton was my host and I got along good with him. I was kind of tired this whole weekend but we were able to still have a good time."
Carswell spoke with USC head coach Pete Carroll and offensive coordinator Lane Kiffin, but said the whole staff was just as impressive.
"I talked with Coach Kiffin for a while and Coach Carroll too. Really just the whole staff is great," said Carswell. "Going to USC for my trip makes me have to really think more now between the two. But I haven't made a decision yet. I still have to think about what happened at Cal and what happened at USC and compare them."
In fact, Carswell said he may take at least two more trips and possibly a third in January.
"I wouldn't really say that Cal or USC are the only two schools just yet," said Carswell. "Oregon has been there and Arizona State just came up, I'm not really sure if I'm going to limit it to those two (Cal and USC) right now. I'm going to try and take those trips to ASU and Oregon."
Arizona State had offered Carswell when Dirk Koetter was still the coach but with Dennis Erickson now taking over, is the offer still there?
"Yes, that staff had offered me a scholarship when they were at Idaho," said Carswell. "I know Coach Erickson and I know that staff really well so I'm going to be looking at them now."
UNLV could get his fifth, and final trip, if he decides to look outside of the Pac-10.
"I actually think I might go to UNLV because I do have some interest there," said Carswell.