need to access travel agencies to escorted tours to yellowstone national park?

We would like a complete package tour to Yellowstone national park and need suggestions on travel agencies that provide that service.

Almost any travel agency can do it. Major tour companies typically work with any accredited travel agency.

Check with a couple of agencies in your area and see if any have someone on staff who knows Yellowstone well. Check also to see if the agency is a member of ASTA (America Society of Travel Agents). ASTA members are required to adhere to a code of ethics.