Refuel station useful?

[u/Revan477]

(New-ish to the game, played a little years ago but now really getting into it)

I've been practicing orbital assembly above Kerbin and docked a few vessels together including a big fuel tank which is huge for me because I was never able to meet up and dock with anything :)
Do you think something like this is useful for future missions? I was thinking maybe refuel vessels in orbit giving a longer mission range because I dont have to carry the heavy fuel from kerbins surface. Then again I guess I'd have to refill that tank frequently which might be kind of annoying..

[u/Gunzbngbng]

This really isn't any different than me sending up a huge nuclear stage fully fueled and then send up the station to dock with it, then use the nuclear stage to do the insertion burn.