I would agree if it's not a problem, keep feeding the trout pellets so they can attain maximum size in the shortest time.
They will definitely take advantage of most forage available and pellets are cheap insurance. The trout in my pond have gsh, ps, frogs, tadpoles and tons of dragonfly nymph's judging from all the nymph exuvia stuck to the cattail stalks, but they still take some pellets.
I don't have any experience with splake, but the Tiger trout will be more aggresive than either BRKT or RBT to take bait or lure when your fishing, definitely get tigers.
