I enjoy hunting on the ground much more than a tree stand. I still find areas that a tree stand will give me an advantage and have had success but just as much success on the ground. My father had polio growing up and has never been in a stand and he is very successful with a bow.
On the ground it usually comes down to wind direction. You can wash gear and bath in scent purifying whatever... you can’t beat a deers nose. If you are hunting deer that are not hunted or care about human scent you are lucky but I doubt you have that luxury.
If “still” hunting in one spot... you should pick your sitting spot according to the wind. Believe it or not, deer walk ridges just like elk. Game trails usually run up and down these just like the mountains out west. If you know the wind direction it is better to be down wind even if it’s down hill from the game trail. Last year I shot my buck at about a 30 deg upward shot.... right where I expected him to be walking and I was down wind and down hill. If the wind was to change direction I would have either went to the opposite side of the ridge, or picked a different spot. In any area I pick my spot according to the wind. If the spot is perfect and deer are there every night but the wind is wrong I avoid it until it is right. Doesn’t always work out but once you blow the spot up you won’t get lucky there again with those deer for a while.
Pre scout those spots. Get or clear a good shooting lane cut from your seat to the trail Before the season and take notes on yardage and angle. If you set yourself up at 30 yards but 30deg up hill you need to practice that shot. It’s a lot different that 30 yards down from a tree stand or shooting on flat ground. Aiming points are much different to hit vitals.
furthermore.... when walking into your spot loop big downwind so if you do leave any scent it won’t be on the trail they will be walking on. pre season make trails from two directions to your spot so you can sneak in and not leave scent in front of you on the deers pat
get some leafy camo if your exposed or a ground blind. If going with a ground blind set it up now so the deer get used to it being out there. I like to take brush and set up to hide me as they walk up to my shooting lane and if lucky enough to have a tree to draw I will set my seat behind it with enough room to draw as the deer passes by and can’t see me.
I hope something in this might help you out. Good luck!