Be advised that during EMH, although AK is open until 8PM this Thursday, the Safari is scheduled to close at 7:15pm. I didn't see the schedule yet for Memorial Day Monday, but it's a safe assumption that the Safari will close at that time, 7:15 as well. If I find out differently I will certainly give you an update.
Also, re: EMH...Thursday evenings also normally have Magical Gatherings Safaris take place, just after the usual 5pm closing. This will still be done, with the main standby cue closing temporarily during the switchout for EHM. In other words, the cue will close to day guests, then the Magical Gatherings guests will be accomodated, and finally the main cue will re-open to EHM guests with wristbands