My learnings so far. With a 10 inch dob (heights are slightly different etc).
Yes, a Dob does get you moving and bending. There is some physicality to it. To the extent that on cold nights I deliberately forego a chair as the moving and bending and such helps keep me warm.
A Telrad matches a Dob so well for pointing that I wish I had found it first. With Telrad rings displayed on SkySafari or Stellarium and the device on the scope, that's really all I need to find 99% of targets. The Telrad still requires you to get your head behind it and look along the tube more or less to see the reticules, but it is more forgiving than a lesser red dot. Also, Telrad sells Riser Bases (2 or 4 inch) that let you lift the Telrad off the OTA making it much easier to get a view through it with minimal contortions, so consider a Telrad and the 4 inch riser would be my suggestion for easy pointing.
My GSO scope came with a GSO 9x50 RACI. And it's a nice finder - bright and sharp, easy to get aligned. Impressed with it. But I only really need it when hunting very feint fuzzies which in turn is only worthwhile when I travel to dark skies (home is Bortle 5-ish). It can be necessary to pick a target galaxy out of a galaxy group for example, or find a dark nebula among the general wider nebulosity. Stuff where I am really pushing the limits of my scope. I do take it along and fit it to its shoe when I'm going deep like this ... but much of the time, I just use the Telrad. Ergonomically the RACI is very good as you can set it so that the RACI eyepiece is in pretty much the same position as the main eyepiece - just rotate the scope in the rings to put the RACI eyepiece where you want it.
My Dob also has a Nexus DSC Pro push-to system on it. I saw a video on it and couldn't resist. It is pure luxury, a great product, but not that cheap and while I find it incredibly efficient and very good fun to use, I could honestly live without it now that the Telrad is fitted to my Dob. It adds a bit of technology complexity (fitting it, learning the UI) and some extra process steps (alignment) and has some equipment connotations (like, I have found an illuminated reticule eyepiece a boon to getting best possible alignment). But then for a serious and long observing session it is brilliant. It has less to offer casual observers I think. And I would recommend the Telrad first to beginners, by a long shot.
Chairs. I cannot get a dedicated observing chair here in Australia. No store will import them (they have in the past and they didn't sell, shipping was expensive etc). Companies from the USA won't ship them here. So, I have been experimenting. A gas strut office chair works here at home, but is too bulky to fit my vehicle for field trips along with the Dob. I have now acquired a 'folding keyboard / piano stool' designed for musical keyboard playing - and while it is not height adjustable it is the right height so that I can just view through the eyepiece at zenith with my back straight and view low to the horizon by leaning over - and it is compact, foldable, lightweight. So its my travel solution. Drum thrones are also worth looking at, since they are 3-legged, but I couldn't find one that would quite go high enough for my 10 inch ... probably perfect for a 6 inch though.
There is also the LYBAR chair. DIY. Simple, cheap and brilliant. This is still on my list to try when I get a chance.
I find, no matter how fit you are and how much yoga you do, you still want a seat .. just to get your view as steady as possible, otherwise at higher magnifications you just can't get the best view out of the equipment as you are wobbling about too much. A workable seat is thus essential.
