Generally, people only revive a thread when they find themselves in a similar situation, or have something constructive to offer. It's been 6 years, it is likely that the OP has already found an answer & has forgotten about this post. ;-)

In areas where insects can destroy beans & peas, the seeds should be frozen to kill any eggs or larvae... even if the seeds will be planted the next year. The seeds need to be close to 0 F. degrees for several days to kill insects, the temperature reached in a stand-alone freezer. The ice box above a refrigerator usually does not get cold enough... if in doubt, place a thermometer in the freezer to test it.

For frozen seed storage, the greatest risk is not over-drying; it is that the seed moisture will be too high, which would seriously damage (or kill) the seed when frozen. This is particularly true for large seeds such as beans & peas, which take a long time to dry. An air conditioner lowers indoor humidity, so Dlsm's suggestion about drying seed with an air conditioner has merit. Because my indoor humidity is naturally low in Winter, I can dry my seeds just by leaving them open until then. But if indoor humidity can not be controlled, desiccant is the only practical way to reduce seed moisture to the proper level.

While you can re-use silica gel packs intended for other purposes, you will have no way to measure how effective they are. For this reason, I recommend the use of color changing desiccant for seed saving. (This can sometimes be found in hobby stores, where it is used for drying flowers.) Start with an amount equal in weight to the seeds being dried. If the desiccant color changes to indicate moisture saturation, repeat with fresh desiccant until the color remains unchanged. At that point, the seed should be dry enough for frozen storage, and no further drying is needed. Store the seed in a sealed container, along with a small amount of color-changing desiccant - it will add a little extra protection, and warn if humidity has penetrated the seal.

Absent a way to accurately measure seed moisture, there is a good rule of thumb for testing small amounts of beans & peas for proper dryness. If you strike the seed with a hammer (wearing eye protection!) and it shatters, it is fully dry. (For a frame of reference, try this with popcorn.) If it is just crushed, flattened, or the pieces stick together, it needs further drying.

It is actually difficult to over-dry seeds, unless they are exposed to a drying atmosphere for an extended period of time.

One last note, regarding frozen storage. When the seeds are removed from the freezer, the container must be allowed to reach room temperature before being opened. If opened while cold, moisture will condense on the seeds, just as it will on a glass of ice water. That moisture could quickly cause the seed to either sprout or spoil. If the seeds will be used in multiple years, it is a good idea to divide them into multiple zip-lock envelopes within the sealed container... that way a single packet can be quickly removed (and the container returned to the freezer) without warming the whole container.