A trailer sounds sensible if you want your bikes to sportier.
Im not sure a road racer would be the most appropriate tow vehicle, you will need lower gears, a rear traingle strong enough to tow the trailer, enough tyre clearance to fit light touring rubber (25-28mm) and depending on the weather, some fenders. You can fit Race-Guards with zipties and velcro which are OK but the full-length bolt-on style are more effective.

Note that the professional racers who have just ridden the notorious cobbled roads of N France select bikes that are stronger, have more tyre clearance and lower gearing than usual. They still havent fitted fenders but we live in hope....