Welcome to the forum! It is not too late to take honey, just don't take too much. Weighing the hives is commonly done to check if they have enough. You can ask around here how much your hives should weigh going into winter for your area, as the farther North you go the more you need to leave them. You can weigh them by tipping them forward, then shoving a bathroom scale under the back edge and then tipping them back - not perfect, but will give you a good idea. Experienced beeks can just tell by feel, I'm sure not there yet! Also you can take honey from one hive if they have extra and give it to another to boost. ALSO, and this is important, besides having enough honey, they need to have enough bees, as too small a cluster won't be able to generate enough heat. Again, check what is recommended for your area, here it is tip the second deep back from the first, and if in a few minutes the surfaces are not covered in bees, it is not enough. That said (and it is always this way in beekeeping, I swear) Russians can often overwinter with smaller cluster sizes. It is always better to combine and have a healthy hive that you can split come spring than two dead outs.