If you are going to SRT up those huge trees you showed pics of, you will want to get a foot ascender. There are quite a bit of straps and strings and contraptions to use if you are going to attach your leg strength to your hand ascenders. They just wrap around your ankle, and up the rope you go. I have the Petzl and I like how easy it is to slip on & off the rope. There are other brands that don't slip off as easy, but some guys prefer that.
I suspect that you will mostly have spurs on, which might make it a bit tricky to use a foot ascender at the same time.
When you get that rescue-8, make sure that you get a few loopies with it. Once you are up in a tree, you will be surprised how often they become handy. I use my rescue-8 as a collector to attach all my 10-12 loopies to. It has a nice big ring that has room for lots of carabiners. Once you have that equipment, then you are ready for speedlining, multiple branches coming down with one lowering cycle, all sorts of cool tricks.
The rescue8 and a loopie attached to a good anchor point also makes an excellent friction device for heavier branches you need to lower under control when you are by yourself. They are not as good as a port-a-wrap, but they are a heck of a lot smaller, lighter and more versatile. I don't think anybody lowers themselves out of a tree with a port-a-wrap.
BTW: thanks for your comments on my behalf down in logging. They sure gave me a load of crap, didn't they?
I thought the lawn fairies comment was kinda funny. His post sounded like he might have actually been tripping on something; he truly might have been seeing some lawn fairies. Myself, I don't know what they look like.
