Minutes after taking the lead Camp denied Callum McManaman, who was through on goal. However, his heavy touch gave the Cherries stopper the opportunity to prevent his side from falling further behind.
Jean Beausejour also had a glorious opportunity to add a second for the hosts before half time, but he somehow managed to scoop his effort over the goal from three yards.
It didn't take long after the interval for Rosler's men to double their advantage, however, with Fortune's shot taking a big deflection off Joel Ward and ending up in the back of the net.
Wigan remained professional as they saw the game out, and added a third through Jordi Gomez whose strike from range sealed a good day for the Latics.