A well-taken free-kick from Ryan Williams in the 84th minute secured victory for the League Two side in the first round tie and Bentley admitted the dressing room was buzzing.
"That's what football is all about. To win it late on with a well-taken free-kick, that had the makings of a really good cup tie," he told Sky Sports.
"We rode our luck at times but to go through to the next round is an unbelievable achievement.
"We have a lot of injuries and had a lot of our youth team on the bench tonight and players playing out of position.
"We were beaten on Saturday and I asked for response and we certainly got that."
Williams played well all night and Bentley praised his matchwinning performance.
"The keeper held one and two and spilled one or two but he (Williams) is capable of it and has done it in training and in the reserves," added Bentley.
"He has got potential and I thought his set-pieces were different class and the goal was unbelievable."
As for who they might face in the next round, Everton supporter Bentley admitted he would love to face Roberto Martinez's side.
"If Everton are in, I would love them," he said.
"If we could play at Goodison Park or I could manage there against Roberto Martinez, that would be lovely.
"If we can get them, I will be doing cartwheels for a week."
Wolves boss Kenny Jackett was less enthused though, although he was keen to point out that his side had their chances to win the game.
"We defended quite well and hit the woodwork three times but probably could have done a little bit more in terms of being ruthless in front of goal and creative from the wide areas," he told the club's official website.
"It was a great free kick which beat us but we need to take our chances and do a little bit better going forward.
"There were some promising performances from the younger players but we were disappointed overall to lose the game.
"That's not what we wanted to do as we wanted to come here and win."