I think there is just a small downturn in the US safari market currently, but the trend will continue upwards.

Simple supply and demand.

Supply gets smaller and smaller over the decades. Hunting fields get closed by greenie interference, species suffer a decline because of human encroachment, African gov'ts get greedier and even more corrupt.

Some new hunting fields such as Sudan and Uganda, even Angola (!), but they also tend to be higher priced safaris anyway.

Supply decreases.

Meanwhile more and more people find whitetail hunting from a tree stand boring and become a little more adventurous and do a safari in Africa. Cheaper and cheaper airfares. More and more safari shows, DVDs, TV shows in the USA.

Demand increases.

The global financial crisis may be affecting the US and EU economies, and so depressing consumption somewhat.

On the plus side, outfitters catering to the US market might often charge high prices. Some outfitters cater to other markets and often their prices are more reasonable. Same as some of the outfitters selling a lot in the US are willing to do deals as well.