Screw 'em. Nobody here is going to know them by the time they would get back anyway. Let them start a new civilization there.
Seriously though. If the planet has liquid water (as in H2O) its not unreasonable to think that establishing a colony would be an easy task when compared to actually getting there.
Yes, getting there would be a much bigger hurdle, with the one exception of the much higher gravity. Be damned hard for us to build a colony in super high gravity, esp if we had no artificial gravity on the space ship for the journey.