^^^ If you're runnin and gunnin after gobbling birds, prolly not, but it can't hurt. If they're quiet I'd certainly use one if ya got it. I use one almost all the time cuz I'm not a young buck and my knees and back make it hard to sit completely still for a long time. And I hunt with my dog a lot so I like their eyes off of me and focused elsewhere.
You can't go wrong with a hen decoy or two. Where you can get in trouble is using a gobbler or jake decoy. Sometimes they won't want to mess with it. But on the flip side, if you get a dominant bird it can be a heck of a show. If you don't know, I'd start off without the jake/gobbler. This was 7 years ago in the hill country. Man I miss that place. Lots of birds and most aggressive I've ever hunted. My brother and I sat in a deer stand cuz he's even older than me and has a more messed up back LOL. This went on for half an hour. He'd take a break every 5 minutes or so.