It is not easy to find a reasonable tour company if you are travelling alone in Arusha and are pushed for time, so I thought I'd share a positive experience. I tried many companies who quoted me upwards of $780 USD for a two day trip to Lake Manyara and Ngorongoro Crater! Prices are very high due to high park fees ($140) and petrol costs. In the end I found one company (booked through the New Safari Hotel, Boma Rd) which offered me a deal for $510. Still a hefty sum, but the two days were fantastic! The service was excellent, the vehicle was clean (at least when we started out) and in good working order. The guide was very helpful and offered expert advice where necessary. The accomodation, though simple, was very comfortable. In short, I would recommend this company if you are on your own. Contact Kilimanjaro Crown Bird Tours and Safaris, 0748 281316 or email@example.com.