Read this is the ‘80s. I think I read 2 in the series, not sure if there were more (or if my memory is correct).
The protagonist crew was sent first to survey and terraform planets before the real civilians would show up. One outstanding detail was a tree that would grab and inject victims with a chemical that gave them bliss while it sucked all the nutrients out of them which were referred to as ecstasy trees.
Probably also some giant worms in a 'stampede' that have a brain in each end.
And exoskeletons for the crew.