The second-row, 24, completes his one-month stint at the West Yorkshire club when they visit Catalans Dragons tonight, seeking a fourth win in five games.
Although well-respected at Hull, Hadley is behind the likes of Sika Manu and Mark Minichiello plus former Trinity duo Danny Washbrook and Gareth Ellis for back-row spots.
At Chris Chester’s Wakefield, he started his opening two games there but also showed his all-round footballing ability by playing at hooker in last week’s win against Leigh Centurions.
“I’ve done it a couple of times,” revealed Hadley.
“It’s not my position – I am not a hooker – but I will play anywhere for the team.
“We knew they would come at us through the middle; Chezzie wanted me to start at hooker, add a bit of size to the middle and defensively tighten up. I thought it went all right.
“I am just happy playing, that’s what I want to do. That’s the reason I came here, because I want to be playing in Super League.
“I am happy with how I’ve gone and as long as I am playing I am happy. I’ve loved it at Wakefield.”
Trinity began round seven in eighth spot, one place and a point above Catalans.
Hull-born Hadley said: “That makes Saturday a big one in the race for Super 8s places.
“Catalans are a very strong team and playing in the south of France always a challenge.
“We have got to front-up, especially our middles. If we do what we did last week it gives us the platform to kick on and we will be right in the game.”
Having beaten in-form Salford Red Devils, Hadley was helpless in preventing a heavy defeat at Leeds but Wakefield responded with victory over Leigh.
He added: “It’s nice to get some wins. We were really disappointed with what happened at Leeds; we didn’t turn up and we got challenged from the outside – and even the inside – as players.
“We knew we let ourselves down, we had to turn up against Leigh and we did.
“It was really important we bounced back with a really gutsy performance and we did show a lot of character.”