Sounds like a good plan, and definitely good timing before he gets bigger. We have never allowed roughhousing inside, just out in the yard. Even then I stop it if they get too excited or rough. It takes a lot of patience to enforce the discipline but it will be worth it. Now I just have to say stop it, and they settle. When Dell was young I would sometimes separate in her crate to settle her.
I don't remember any of my dogs roughhousing inside, granted I have a senior and she is very well mannered when I rescued Ruger, so the behaviour was just never there. Adding Sitka to the mix was like WWE, all day everyday. I thought it was cute. Now I'm like "WHOA! What am I doing!? We need to nip this. "Lol. I allow them free reign outside to wrestle. If it gets too serious, I intervene, and when they fly up and down the deck stairs, I step in and make them walk up the steps, as Sitka is still a bit clumsy on them, and we already had a broken leg scare.
I've only had to use the kennel 2 or 3 times. When he just wouldn't respond and would try to get me involved in the wrestling. He's smart, and he catches on fast. I really started working to correct this behaviour yesterday. He's already doing better, but its a constant redirection and intervention!
My dogs are only allowed to play together in one room where they can't destroy anything.It's become an ingrained habit now.When they're feeling playful and the weather is horrible, one dog goes into that room and begins tossing a toy around.The other one shows up a few seconds later and of course I have to go watch them have fun and play a bit too.
If I toss them a toy in a different room they immediately take it to "their" room to play.It's just creating a habit/routine.If I say Play they trot to the room.You could also create the same routine and they would trot to the door to be released to play outside if your yard is fenced.
That's our routine anyway.Others don't ever allow play indoors.You could just separate them behind a gate and give them something to chew or otherwise engage them.Just a couple of ideas.
That's great your dogs have their own playroom! I actually have began creating the habit of going to the door to play. If they're still antsy, after my redirection, I walk to the backdoor and hollar "let's go play" and they're usually hot on my heels. I let them play until they're both laying in the yard. Or I'll bring Ruger in and do some one-on-one with Sitka. It seems to be working over the last 2 days, they're getting the hint.