It's natural for us humans to worry about "our" birds when we're going to be gone for a few days. "What are the birds going to do???", we ask.
I assure you, they'll do just fine, but if you want to provide some foods that will last for the longest period of time after you leave, I do have a few suggestions.
WBU Birdfood Cylinders
When we're leaving home for a few days, our #1 go-to birdfood is large birdfood cylinders. Cylinders are made of a variety of seed and nuts, and some even have suet or fruit in them (with absolutely no fillers). The ingredients are compressed and held together with gelatin to form a round cylinder.
When placed on a cylinder feeder with both a cover and a tray (to keep the cylinder dry and catch pieces as they break off) and on your squirrel-proof Advanced Pole System set-up, a group of cylinders will often last for many days into your absence. The Cylinder Cafe feeder with its large cover and ventilated tray is ideal for large cylinders.
To add even more cylinders to a vacation buffet, I take the hopper feeder off the top of one of my Advanced Pole System set-ups, replace it with a double crook, and hang two more cylinders feeders. When I return home, I switch back to the hopper feeder. This flexibility is one of the many advantages to the WBU Advanced Pole System!
To provide suet while you're gone, a suet cylinder works well and lasts longer than a small suet cake. Below is a suet cylinder being enjoyed by a Rose-breasted Grosbeak. You can also put a suet cylinder in a WBU Dinner Bell feeder (pictured below with a small cylinder) that lets you lower the cover to exclude larger birds.
WBU Eliminator Feeder
Our Eliminator Squirrel-proof birdfeeder holds a lot of seed (3 quarts) to last many days into your time away. Squirrels are not eating away at the seed, so all of it is for your birds. It has weight-sensitive perches, so if you want to exclude larger birds, you can make the adjustment and the seed will last even longer.
This squirrel-resistent birdfeeder holds a LOT of seed - 10 pounds of it! Birds that tend to "sweep" at birdseed in search of the heaviest seed or nut will have a harder time doing that through the square feeder ports, so less seed is sent flying to the ground. (We say "squirrel-resistent" vs. "squirrel-proof" because we have had Red Squirrels and chipmunks figure it out.)
We fill ours with safflower seed, which the Purple Finches and grosbeaks love, but the Blue Jays don't prefer. That helps the seed last longer!
Now depending on how long you're gone and the availability of natural food sources, your results may vary, but these are the strategies I use to feed the birds as long as I can while I'm away from home. Now you can enjoy your vacation and not worry about your birds!!!