The Park is always extremely busy during December and January, which coincides with being both very hot (average temperatures are just over 30°C) and the school holidays. Early booking of accommodation is definitely advised if you want to visit during these months.
January and March are also the wettest months, and the Pan may fill with water if the rainfall is exceptionally heavy.
The Park is incredibly lush and green, and certainly elephant and rhino can be harder to spot, as they seem to 'disappear' into the thickets to feed. However, there are large herds of zebra, wildebeest, giraffe, oryx and springbok on the open grassy plains, and many animals also have their young at this time of year.
The winter months between July and September are the dry season, so the temperatures are cooler and there is little or no rain. The veld is drier, making for better viewing both in the bush and around the many waterholes, where the animals will more frequently gather to drink.
Spend some time at one of Etosha's waterholes in the dry season and you will see a constant stream of elephants, zebras, wildebeest, oryx and other wildlife coming to drink. Lions and black rhino are also frequently seen.
The recommended stay at the Park is at least 3 nights. An ideal scenario is to stay near one gate for a night or 2 and then drive through the Park and stay at near the other gate for a further night or even 2. This gives you the opportunity to travel right through the Park without doubling back on yourself, and experience new and different game viewing opportunities.
However and whenever you decide to visit Etosha, the memories will stay with you for a very long time.