Here are some possible sources for securing volunteer help to train your team for the Invitational.

Association of Consulting
Foresters of America, Inc.

Society of American Foresters

National Association
of State Foresters

Directory of State
Extension Foresters

Directory of State SAF-accredited Forestry Schools

You might also want to consider other sources of help for:

Tree Identification
* Botany instructor at a local junior/community college

Use of a Compass and Topographic Map Use
* nearby National Guard Armory personnel
* local Scout leader
* local orienteering club; click on the button below for the US Orienteering Federation, and then click on "Clubs" in their web site menu for a list of orienteering clubs in your region.  There likely is someone in one of the clubs who will help you with compass and pacing instruction and the use of topographic maps..

US Orienteering
Federation