There is a thread floating around about vbacs in baltimore hospitals. I believe on that thread it was mentioned that there are 3 hospitals in the state that have mobile telemetry: Mercy, B.W. medical center, and one more. hope that helps you.
Anne Arundel has mobile telemetry monitors. Upper Chesapeake does not. That's all I know.
Baltimore Washington Medical Center has telemetry available, as well as a birthing pool (can't have bub in there though) etc. I UC personally, but when I had to go to the ER for a kidney issue, I inquired about their VBAC policies and spoke to a CNM there about what was available and if telemetry was available.
Mary Knauer at St. Joseph's told me they just did a pilot program with mobile telemetry and they hope to have that in place by the end of this year.