Bag options for road bike

I have a carbon fiber road bike and am planning on doing a multi-day tour along the East coast. Any suggestions for carrying stuff on for the journey? I’d like to avoid a backpack.

seat post clamping rear rack, with thrown over “saddle” bags. reasonable space for five to eight kilos, not more.

no reasonable options if you want to carry a tent other than getting a real touring bike with real rack mounts.