Hey Mike
I really don't think there is any risk in moving them in a bit early, even with leaves. If your garage is cold, and plants get less water, leaves are going to quickly pale and drop. I had a few trees that I brought in last weekend, they quickly realized that it was time to go dormant, and most leaves are on the verge of dropping. Of course a few nights of colder temps next week will surely induce dormancy, and won't harm older trees, branches. Really new growth might be impacted, but really no cause for alarm. Good luck!.