The bus tour is the only way to see the wild ponies on the Virginia side (the park "conveniently" blocked off the road to the ponies for all transportation and bikes, except for the park bus), so a ticket is necessary. Also, there are no mosquitoes on the air-conditioned bus, which was a nice break from those little terrors. The tour is led by volunteers. Our volunteer lived several hours outside of Chincoteague and was a little flighty, but nice. We went by the lighthouse and saw many birds, turtles, and Asian elks (which look like baby deer).
But the highlight, of course, was the wild ponies. Both the Virginia side and the Maryland side of Assateague are permitted to have 150 ponies. These ponies had their babies a few weeks before we arrived, so we got to see the wild ponies, as well as the babies frolicking in the fields. Every year at the end of July (this July it will be the 80th year), Chincoteague has the annual pony swim and auction. The ponies swim from Assateague to Chincoteague Island, and the Chincoteague Fire Department then sells the baby ponies at a giant auction that attracts up to 50,000 people. The Chincoteague endearingly say that their fire department is the richest in the country because of the pony sales.