Many parks and other venues have asked for a tentative schedule so here it is:  

After the March 6-10 Spokane tradeshow, I’ll be continuing my my odyssey north up to the Chicago area (April), then east to Acadia and down the Eastern Seaboard parks in May-early June:  Civil War sites, Blue Ridge Parkway, Shenandoah and Great Smoky Mountains.  I may visit Everglades again.  In mid-June I’m back in Cody, Jackson Hole, Grand Teton (June 18th) and will then work my way west and revisit Sequoia, Yosemite, then northward to Redwoods, Lassen, Crater Lake, Olympic (?), Mt. Rainier, Glacier and rendezvous at Gardiner Mt. for the actual Centennial at Yellowstone North Gate (August 25), then Grand Teton again, Rocky Mountain  (Sept 2/3), then SW parks ending at Zion November 11.  This is very approximate–so visit the Events section on my Facebook Page.  So far I’ve given 29 talks and 1200 visitors reached.