Additionally, Hughes wrote to Maheu: "I would hate to see the Landmark open on the 1st of July and then watch the International open a few days later and make the Landmark opening look like small potatoes by comparison." Maheu became concerned, as it was difficult to plan the grand opening without knowing the date. As the tentative opening date approached, Hughes became concerned about other events scheduled for July 1969 – such as the Apollo 11 moon landing – which might distract from the publicity of the Landmark's opening. By mid-June 1969, Hughes had still not given a definite opening date, which was still tentatively scheduled for July 1, although Hughes had wanted the Landmark to open sometime after the International Hotel. Weeks before the tentative opening, Hughes obsessively made repeated changes to the guest list for the resort's opening night. Regarding who should be invited, Hughes had complex specifications for Maheu to follow. Maheu ultimately had to decide the guest list himself.