I am not in your industry but have some advice that applies to any engineering field:
A graduate degree will make it easier for you to transfer jobs while keeping a higher salary. You may be fine climbing the latter with a BS in a single company but when it is time to move to another company (by choice or not) it will be tough to keep your pay. With a graduate degree there is an automatic pay level they will have to start you at, experience or not.
With every level of education, chances of being unemployed go down. There is a big difference on that statistics betwen BS and graduate degrees. We have posted those stats on here before from the department of labor.
Grad school will also extend college - a time you will miss very much as soon as you are in the corporate hamster wheel.
George