Generally, you want to have flies that imitate the predominant forage where you'll be fishing. Stripers are not usually selective, but they can be. Size of the flies is often more important than the exact colors.
I agree with the above suggestion, as that's a very productive color combination for Clouser Minnow's. I like both Clouser Minnows & the Half & Half versions, tied with both feather tails, and some tied with rabbit strip tails. Lefty's Deceivers are another good style to carry, as are Bendbacks & Seaducers. Flatwing streamers are also a good choice.
Again, you should have some flies to mimic whatever forage is present. So, if it's Sandeels for example, thin, sparsely tied patterns should work, and if it's Bunker or similar baitfish, then a fly of appropriate size & profile.
Your Smelt patterns would probably work fine, although the hook sizes & type might not be appropriate for the Stripers.
One note about Clouser Minnows, or any such fly with barbell eyes. many folks tend to tie them with barbells that are way too heavy. Sometimes you need the heavy eyes, but in shallow water conditions, you probably don't. I tie many with brass barbells and just heavy enough that the fly will ride point up.
The design of the Clouser is intended to have a jigging motion and at the same time will glide thru the water like other streamers when retrieved . If the barbells are too heavy, then the jigging motion will be much more pronounced, and although that's not always a bad thing, they tend to hang up on any snags more and you might as well tie on a bucktail jig than a fly.
Tie some and vary the weight to cover the water column & conditions and you'll catch more fish than if you just tie them heavy.
If you aren't already aware of the site Stripersonline, check it out & check out the Fly Tying section. There is an on going thread titled: "A Fly a Day". There's a lot of excellent flies in that thread and many excellent tyers there who primarily target Striped Bass.
