Autumn and winter (April through August) are good times to visit Botswana, as the days are generally pleasant and the wildlife never wanders far from water sources. Bear in mind, however, that this is also the time of European, North American and South African school holidays, so things can get a bit crowded. In general, June, early July and mid to late September are the least crowded times to visit. Summer isn't the best time to hit the back roads, enjoy wildlife viewing or explore the Okavango, as prolonged rains may render sandy roads uncrossable, and animals disperse when water is abundant. From December to March it is very difficult to get around Chobe and Moremi national parks due to heavy rains and many lodges actually close.