I hunted from the ground exclusively for 4 years and got CLOSE soooo many times. Actually, I had 3 deer in 4 years on the ground where I just screwed up the shot, but I was able to shoot. In the end, I always wound up getting busted, buck fever or something small would screw it up.
Last year I returned to the trees and the only reason I didn't get a deer was poor shooting on my part. Should have had 3 different deer cleanly in just one season on public land.
It is your call. I never sold my stand, but was able to put it away for 4 years. I have decided it is time to get a few under my belt, so to speak, and stay in the trees again this year. That is my personal choice. You have to decide what is more important to you.
You can put the tree stands away and stay with it! Make sure you build a number of good ground blinds well in advance of the season though. And not just one blind per location. You have to plan on the wind and put multiple blinds in an area to give you an advantage. You need it when hunting on the ground. Don't be afraid to "ghillie up" either.
Just a few observations on my part.