@blakeman I see you posting frequently about saddles on archerytalk.com, and am happy to see you've posted here as well. I think you'll get much better responses here than you would on AT.
I will answer each of your questions, but first I want to suggest that you should try and sync up with a saddlehunter who is local to you. There is a saddlehunter google map you can use to find someone close. I think being able to see how a saddle hunter sets up will put most of your basic questions at rest. Here is the link:
https://www.google.com/maps/@37.3978941,-86.4406581,5z/data=!4m2!6m1!1s1GhuYfPZR436tAHCVJAi2Z9oc-oc
However, I got an error stating the map had too many layers. Look for the message on the bottom, then tell it to 'open in my maps'. Then you should be able to see all of the users on the map.
I'm in my late 50's just wondering if a saddle would be a good option to a climber?
As you age and are wondering how to reduce the amount of weight you haul into the woods I think a saddle is a great option! Not to say you're incapable of hauling a climber, but i've been there at age 26 - hauling a 20lb+ climber into woods along with other gear. It's no fun. I knew from that first season I had to go lighter.
I can sit for hours in comfort in a climber, but I'm not sure how comfortable I would be in a saddle for any length of time?
Unfortunately there is almost always a 'comfort curve' that has to be gotten over when starting to saddle hunt. And comfort is going to be totally relative. Out of the box your saddle may or may not be as comfortable as a climber. It may take some adjusting and spending time in a particular brand/model of saddle to get dialed in. It might take a sit or two to iron out all of the kinks. Still, on a whole, I find saddles to be much more comfortable than hang on and climbing treestands.
It also seem like you would have more setup and weight to get to hunting height with a saddle?
Potentially. It really depends on your climbing method and platform solution. I know with 4 LW sticks and a DIY XOP platform I am walking into the woods with about 16lbs of gear to climb and get setup at hunting height. Still not bad, but maybe not as lightweight as you'd like. If you use aiders, a SWaider, a Knaider, or other devices to assist in climbing you may significantly reduce weight for mobile hunts.
Also, on private lands where you are comfortable using screw ons or pre-set climbing sticks, your weight can extremely minimal - just your saddle and your bow, and whatever other gear you haul in.
On a whole I would say setup is less bulky but maybe slightly more involved than a climbing treestand, but not drastically so.
It's ez taking most shots out of a climber than a saddle?
Yes, very easy. For the most part it's not much different than shooting out of a regular treestand. Offside and around-the-tree shots can be challenging, but with a little practice can be made comfortably. Shooting, for me, is not an issue out of a saddle.
Is a sit drag going to be the same as a saddle?, if you already use a rock climbing harness?
Honestly I would suggest a commercially made saddle like a aerohunter kestrel or kite (or tethrd mantis, though you may not have it in time or season) before jumping into the DIY saddle game. Unless you really like sewing and DIY projects. The commercial saddles I have owned (I still own a kestrel) are basically bombproof when compared to something like a sitdrag. Though when coupled with a rock climbing harness you still have a relatively safe setup.
So Tell me why a saddle or sit drag would be a better option than a climber at my age?
Assuming you're relatively fit with no major mobility or injuries... saddles are objectively lighter, safer, and give you more options on trees to hunt.
Hope that answers some of your questions.