Wolves may still be top of the Championship, but a run of just one victory in nine games has seen their lead eroded by Reading and Birmingham.
McCarthy decided last week, before the 1-0 defeat at Burnley, to take his squad to Spain to regroup before the final push for promotion and he claims the trip has felt like a pre-season training camp.
"It was interesting talking to some of our lads and they feel the same, it is almost as if we are starting again," McCarthy told the club's official website. "That was an observation the guys made when we were talking on Monday, when we were having a chat and seeing how they felt, and they were at pains to point that out, which I thought was interesting.
"It is a good time to get away and the lads feel the same about coming back. It is almost like starting again. We have had a bad spell so we can have a fresh start on Sunday against one of the form teams in Cardiff."