Adding Reservoir to DWC Buckets?

I have two 5 gallon DWC buckets and wanted a simple way to add a reservoir so I can leave for more than a day at a time. I was thinking about making a PA Hydroponics style fallponic system, but just adding a reservoir to feed the 5 gallon buckets might be simpler.

The main question I have is can I run a tote as a reservoir (with the water level inside the tote equalizingmy 5 gallon buckets’ water level) with a barb fitting and water line leading to a barb installed at the bottom most part of the 5 gallon buckets?

The biggest concern I have is that most setups I see with a reservoir is RDWC with bulkheads and return lines to keep the water in the reservoir and growing containers churning. Would having the nutrient from the reservoir (with air stone in reservoir) constantly maintaining water level in the buckets cause any kind of nutrient salt or oxygenation issues compared to running the buckets standalone or is building a RDWC system with reservoir/control bucket/water pump/bulkheads the better solution for being more “hands off”?