Clarke, who has already added eight new signings to his squad, is keen to add more experience to the line-up with his current crop having an average age of just twenty-two.
The squad will fly out to Poland on Sunday before taking part in a behind-closed-doors friendly on Tuesday, and the gaffer is hopeful to have added more players before they depart.
Speaking via the Express & Star, Darrell said; "I’d like to think there will be two of three added before Poland. We have got Jack Rose in who will provide good competition for the number one spot.
"The two keepers will push each other. And I’m hopeful we are close to a few more. We are in a market where we can’t always get our first, second or third choice because they are wanted elsewhere.
"But we want to bring a certain style of player and I keep mentioning that word ‘hungry’. We want players with something to prove. We want players who are going to play for the shirt and the football club.
"And I think you can see in the first couple of games the energy levels of the team. We like to play on the front foot, mix our game up. Hopefully, it’s knitting together nicely."