That same year, he married Marie Renault of St. Albert and became proprietor of the Astoria Hotel in that city.

For his performance, the Calgary Morning Albertan lauded him as "fearless champion of a lost cause" and suggested that he had voiced "sentiments which perhaps many of the present legislators felt but lacked the courage to make public."

Federally, when many Liberals rushed to support Sir Robert Laird Borden's Union Government during the Conscription Crisis of 1917, Boudreau remained loyal to Sir Wilfrid Laurier's anti-conscription Liberal stub.

Boudreau, who stood little over five feet tall, was given the nickname "the Little Napoleon of St. Albert" by Perrin Baker, minister of education in the cabinet of John Edward Brownlee.

Lucien Boudreau's brother, Rudolphe, was Secretary of the Privy Council under Sir Wilfrid Laurier.

His sister-in-law, Alice Renault, was married to Boudreau's sometime electoral opponent Omer St. Germain.