1) I feel your pain.
2) I have heard of totally, positively, and equivocally ruined vacations because
. . . people didn't get a free room upgrade
. . . people didn't get one of their favorite ADR's
. . . people didn't get their child onto a special activity
. . . people didn't get to the tequila bar
3) I can't help the others.
4) But, I have a solution to you problem.
5) They make a "camel" water bag
. . . worn like a backpack
. . . has a straw that goes to your mouth
. . . holds up to 2-gallons of liquid
. . . can keep it cool
6) Now, just carry a handful of salt and a lime, and you got it made.