Somebody in daily is the answer, and it is better than boarding because they stay in their own cage. Give the sitter an actual list rather than a general instruction: blow the husks off and refill the seed, change the water, offer the veg if that is the routine, and look at both birds long enough to see they are active and eating.
Leave your avian vet's number and say out loud that they should ring it rather than wait for you to land.