To my knowledge, SKW has not intentionally hassled anyone over military leave in recent memory. They don't always have a complete understanding of the federal law which protects us and may need to be enlightened on occasion, but they have always been supportive.
I would probably take the job if you can...when you finish military training and get a few hours under your belt you would qualify for a pilot job at SKW and your previous ramper employment would count towards longevity for benefit purposes....and that will include ALL the time you were on military leave. You could reasonably be a first-year pilot with 3-4 years of benefit longevity. This will not count for pay or seniority, but will count for things like vacation accrual, performance bonuses, 401K contributions, non-rev priority.