TG, I know exactly what you're talking about!!!
The most I can do sitting, PERIOD, is about 3 hours!!! I have a bad back, and I have to stand up & get the legs moving every so often... Many times I hate to "infringe" upon my friends, because they want to put me in thier best stand, for a long sit. Years ago, I had a friend put me in his best stand at 5am. I good hour or more before 1st light!!! By 7am, I was shot!!!!! I looked around good to make sure nothing was around & climbed down... Over the next few hours, I quietly cleaned all of the debris from around the base of the tree. I saw a few deer, but nothing in range. 1 big doe & 2 fawns came in and winded me, but never actualy spooked...
About noon, my friend came back, saw what I did..... The first words out of his mouth were, "You ruined my best stand!!! Why didn't you stay up in the tree like I told you to???" then he continued to rant about how I spread all my scent around, and the stand was done for the rest of the year... (Good thing I didn't tell him I "watered" the bushes, lmao!)
Now I make sure it's perfectly clear, that I'm a "gound pounder"!!! Just show me a good spot & I'll find a place to park my butt.....
I have a ladder stand set up on proprty we hunt. It's in a really good spot, and I sit there often, but usualy only a couple hours at a time. It's really more of a "community" stand, lol!
Best of luck to you!!! But, don't be afraid to sit on the ground... I've killed alot of deer at eye level!!!!!