As cute as they may be, chipmunks can become a nuisance in a garden quite quickly. Once they uncover your treasured bulbs, they will feast on them until you stop them or the bulbs are all gone. Fortunately, there are some bulbs which do not taste as good as others, and planting them instead, may keep the pesky critters away. On the other hand, testing out a few preventive measures, you can find out which bulbs they will not eat due to a simple barrier or unpleasant taste you have applied prior to planting.
Talk with a local nursery worker. He should know which bulbs, such as daffodils and alliums, are less likely to be eaten by chipmunks. You can also check a reputable website that provides this information, such as the Humane Society or a university extension office (e.g.: University of Vermont Extension).
Label your garden so you know which kinds of bulbs are planted where. After the flowers are spent, it's often difficult to tell which bulbs are which.
Apply different repellent measures to some of each kind of bulbs. For example, plant some of your daffodils, tulips and crocuses in cages, under chicken wire and with an application of squirrel repellent, which makes the bulbs taste bad and works for chipmunks as well.
Notice which bulbs were dug up by the chipmunks (to be eaten) and if any repellent measures were effective. Use that information to help you choose your bulbs or which kind of repellent to use in the future.