June sees the start of the best season for guided walking safaris in private concessions, especially the Linyanti region. This gives you the chance to stay in mobile tented camps and get right into the action. These are best avoided at the hottest times of year and also the rainiest. If you enjoy walking safaris, combining your Botswana safari with a trip to the South Luangwa National Park in Zambia, home of the walking safari, is an excellent option.
A fun event for those interested in cars is the Toyota 1000 Desert Race which entails extreme off-road driving across Botswana. The routes and dates change each year so a bit of research into the event beforehand would be needed.