There is an extensive train of thought that working dogs should not have squeakers or tuggy toys.
The trainer I am working with does not follow this advice and Chase has had raggers, tuggers and squeakers (rubber ones not furry ones) and he has certainly never tried to squeak his dummies, play tuggy with them and he was equally good on both the cold and warm game he has had, very nicely mouthed.
I like playing with my dogs and feel it helps build a relationship with the dog, they don't however have loads of toys to play with when I am not with them, play is part of interaction between us. (This is partly cos Freddy is a manipulative swine and doesn't play nicely with his 'brothers' when toys are out, one spaniel has been seen lying over the whole toy stash to guard them all

). I also control when play starts and ends so by building self-control in a play environment you are building a skill that will be needed in the field which is even more stimulating than a good play session.