Huge timewarps and interstellar travel similar to the historically proposed Project Daedalus

If we could timewarp by many years and have nuclear engines, maybe we could have many planetary systems in some sort of galaxy and actually do interstellar trips? The lowest estimate I found was around 50 years for unmanned Project Daedalus spacecraft, so it's not as impossibly long as it may seem. Here are some references (sorry for using Wikipedia as a source, but I didn't have time to search for scientific articles on this):
https://en.wikipedia.org/wiki/Project_Daedalus
https://en.wikipedia.org/wiki/Project_Orion_(nuclear_propulsion)
https://en.wikipedia.org/wiki/Nuclear_thermal_rocket
Anyway, it would be really cool to do interstellar travel in an actually scientifically correct way and the combination of huge timewarps and nuclear propulsion makes it possible ^^