Some will say that yeasts like k1v-1116 are more likely to keep the subtlety, whereas something like d47 might blow the fruit straight outta the airlock... my suggestion is (if you have a decent supply of berries) add to both primary and secondary. Or if you can, make 3 test batches: primary, secondary, both. Make sure to age them properly and that will give you a great idea about how a specific yeast handles fruit.
Temperature control may help your cause as well, after proof of activity maybe adjust the temp to 62-65 F until the 2/3 sugar break then let it finish out at 70 or whatever the ambient may be