Written By: Steven L. Kohls | 3:00 am, May 20, 2021 × Wayne and Tammy Hendrickson ride their electric bikes on the East Gull Lake Trail Tuesday, May 18, 2021, after parking their recreational vehicle at the Gull lake U. S. Army Corps of Engineers campground. The retirees travel the country volunteering at U.S. Army Corps of Engineers campgrounds and parks. Steve Kohls / Brainerd Dispatch Wayne and Tammy Hendrickson ride their electric bikes on the East Gull Lake Trail Tuesday, May 18, 2021, after parking their recreational vehicle at the Gull Lake U. S. Army Corps o...