Jacqui,
Kenya is an interesting country, and there are lots of places and ways to travell cheap. The key thing to do is to avoid the hustlers. Anyone trying to give you a deal. Anyone trying to make contact in a rush. You have to be war ymost times and counter check information before you venture out.
I live in Nairobi and are willing to help. You can ask for further information through this post. For great perspectives on kenya you can view the Kenyan Blogosphere. There is a link to it on my blog:
http://potashke.blogspot.com
you can also opt to contact me throught the email me link below.
wishing you a wonderful stay.
Potash