Having anyone or anything, "mess up your hunt" is frustrating. No matter what or where you hunt. But that's part of public land hunting and hunting fair chase. If you want a guaranteed kill then baiting bears in Utah is not where you should be looking. I've been on over 140 bear kills over bait, I've had hounds my entire life, and I hunt just about every species offered in Utah. So I know well enough how much time and effort it takes. I can promise you one thing, those houndsmen have ten times the amount of time and money invested as you do baiting. Other hunters mess up the hunt for the houndsmen every bit us much as they ruin it for anyone else. But they don't complain. What has played a major role in causing this problem is big game hunters complaining about houndsmen in the fall/the spring season dates being way off what they should be. There's about two weeks a year that a houndsmen can have much success finding bears to run, so that forces everybody with dogs to be on the mountain at the same time. Sure it would be great if every hunt had its own time on the mountain without anybody else there. Hell I'd love to hunt the Henries for deer every fall without another person on the mountain. But that's not life. As a general rule houndsmen do what they can to avoid conflict with any other hunters because we know we are last priority to the DWR. In fact most houndsmen I know are willing to give great advice to bait hunters, as to where to find bears, and avoid other doggers. Thinking because dogs ran a bear past your site will keep them from returning to the bait is foolish. That's the primary way to start a bear with hounds in Idaho, is off a bait. And those bears come back day after day to run off that same bait again and again. Unless the houndsmen was one of the lucky few with a kill tag and harvested that bear, then they aren't the reason the bear doesn't return.
Sorry for the bad luck, but hey, it's hunting. The challenge is what makes it rewarding.