The streets of downtown Glen Arbor are packed these days with tourists, beachgoers, and shoppers. The tills hum at apparel shops, rented bikes and kayaks roll off the assembly line at Crystal River Outfitters, and there’s a hungry line out the door at Art’s Tavern. But “help wanted” signs on storefronts, restaurant entrances and social media appeals, have become as ubiquitous in our tourism boomtowns — in Glen Arbor and up and down the Lake Michigan shoreline.