Oleg has been nearby, and while he's been trying to make it seem like he's not eavesdropping, he nevertheless is quick to respond to any questions.
"Aye, they've always come on horseback. They dismount once they're in the gates to load up their mounts. That might be the best time to spring an ambush; if they try to escape, they'll have to waste time re-mounting, or else try to flee by foot, and then we'll have their horses and could chase them down."
He looks to make sure his wife is out of earshot, before whispering,
"If you need to, I can lure them in a bit. We don't have to call it using me as 'bait,' per say... just part of a convincing illusion that all is normal. Once the arrows start flying, I'll make a break for cover."