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I don't think the dog is an issue, but the go cart (and noise) definitely are. Woodies are very wary and leary. Once the hen picks a nest box and lays eggs, she's not likely to abandon them even if annoyed. I don't know if Northern Michigan's spring duck migration is the same time as Iowas. Our wood ducks appear within a week or less of ice out, and begin looking for nesting spots. Maybe you could try to limit activity and noise a bit during those precious few weeks?
Don't give up hope. Some hens have to try to nest a second time if the first time is disrupted. We had hatchlings in August 2 years ago.

COVID19 has been a challenge, for sure. Getting pretty tired of donning and doffing PPE. I look like "The Mandalorian Smurf" (our gowns are blue). 😉


"Politics": derived from 'poly' meaning many, and 'tics' meaning 'blood sucking parasites'.