I'm just back from 6 days on the Selā.
We had nice water and phenomenal fishing with 166 fish landed to our 6 rods with many more lost.
We had many msw fish up to 20lbs.
It was fly fishing heaven.
Yes there will be a guide, where the guests (me) will drive behind. It's to prevent too close contact between guest/guide.No problem if you got a 4x4. You can reach all beats and pools easily. It might be a problem to find them but I assume that you will have a guide.