Websites for Caesars Entertainment, Boyd Gaming and Station Casinos properties show guests can make reservations for dates beginning 15 May.
Phil Ruffin-owned Treasure Island Hotel and Casino is also taking reservations starting 15 May.
The Wynn Las Vegas website is accepting reservations for 22 May, the start of Memorial Day Weekend.
Nevada Governor Steve Sisolak has not yet announced whether non-essential businesses including casinos will be allowed to open next month following the weeks-long shutdown due to coronavirus.
Last week Las Vegas Mayor Carolyn Goodwin made strong yet controversial statements in support of reopening the city’s casinos.