I don't have the 600, but I am going to get the 3002.8 II soon.
I use a WH-200 Gimbal Tripod Head II with Quick Release Base (not the sidekick). You will need an Arca Swiss type plate not a proprietary type (like Benro, etc.) to mount to. You will love both. There are other gimbal heads, but don't go cheap on this or the plate.
I use lenscoat to protect the legs from scratches while going through woods, no other reason.
That's all I can contribute.
Getting more and more sure about that I will empty my account in a couple of month for a 600mm.
I don´t have any gear at all to use with a "great white" so for you who use them or another one of the big ones what do you recommend.
What I know I need is:
Gimbal head = Any suggestions? Thinking of getting a Wimberley because so many are using them and seems satisfied.
Tripod = Thinking of Gitzo GT3542XLS. I know that it´s long but might be useful. Any other suggestions?
Replacement foot / "Arca Swiss plate" = Not sure if I need it. Do you recommend it? Pros and cons?
Quick release clamp = Have no idea if that is useful.
Camo-cover for the lens. = Lens coat or any other brand you recommend?
"Leg warmers" for tripod = Lens coat or any other brand you recommend?
A long list and I guess some might have better ideas than me of what I need. RRS is too expensive when it comes to tripods so even if they are better than Gitzo I think I will be satisfied with a less expensive tripod than RRS.
I have no friends that uses lenses like this so there is no one I can ask for advise. Only times I have seen these lenses is on fairs and those are too crowded to get advises from sales people.