Separate question on biological scanning. Are you supposed to just randomly run around in the SRV hoping you find the bio? I had a few plants that were easy to find but other times I spent 30 minutes in the SRV and saw nothing.
No, actually I very rarely use my SRV.
When you DSS a planet with bio you will see blue patches and at the top center of the page it will give the type of bio the map is related to, if there is more than one bio you can switch through them and and you may see the blue area's change, some species live in the same or similar area's others prefer different terrain.
The colour shade of the blue relates to the terrain underneath it, the terrain can be used as a guide as to where you are more lightly to find them.
This page will give you a lot of details about the types of bio, unfortunately it does not give terrain details, some prefer open area's, some are quite small and prefer hollows or dips, some like rocky area's and some hide up in the mountains (most of the time)
I do most of my searching by flying low and slow, night vision in most cases (not bacteria) helps. How low and how slow depends on the species, some of the Osseus using night vision can be seen from fairly high and fast, tussocks very low and slow.
Another way of searching for the shorter minimum distance types (tussock, frutexa) is on foot, second trigger scans on sampler will tell you if you have moved far enough away for the next sample, running and jumping (+jetpack) can cover short distances quite fast.
Bacteria, some are easy to see, others due to colour can be almost impossible to find, it can be a case of having to fly at the right angle to the light to see them.
Fungoida setisis is normally one of the worst to access, normally only found in steep valleys in mountainous area's (although can very occasionally be found in open area's)
There are other third party aids available to assist but as I don't use them I cannot advise on them.