I go to Kenya annually for work (unrelated to running), but I also run and have been to Iten.
Kenya is a very safe country. I have logged many miles by myself out in remote villages without ever once worrying about my safety.
Iten is an interesting place. Most of the city's economy is based on running, with many camps catering to westerners. Depending on your skill level, the camp would either be a good fit for you or not.
All of the Kenyan runners and teams are on essentially the same schedule. So it is pretty easy to see them. Monday - easy, Tuesday - track, Wednesday - easy, Thursday - fartlek, Friday - easy/progression, Saturday - long run, Sunday - rest. You can basically ask anybody in town where to go on which day and at what time and they can point you in the correct direction. If you show up to the correct intersection on the correct day at the correct time, you will see hundreds of world class runners (Kenyan and western, such Julien Wanders).
That being said, the pro teams won't mix with newcomers, and there are literally hundreds of elite runners there. If you think you will be doing a long run with them of 35k progressing from 3:30-3:10 pace at 8,000ft, then you will have plenty of company. Otherwise, it's easy to do your long run in the same place, but unless you hire a guide to go with you or bring you water, you might be on your own on a road for a long time with nobody around. That's why a lot of westerners run together.
It's a beautiful area with perfect weather. The people are nice. The country is cheap, food is fine (imagine Indian ingredients with British spice levels).
You will have some amazing experiences. Not in Iten, but in Eldoret I happened to bump into Kipchoge one morning and we ran together for several miles. Last time I went to Iten I randomly befriended a Kenyan for an easy run, and he turned out to be a 59 minute half-marathoner.
The only warning I give is don't romanticize the place too much. There are amazing runners, but the vast majority come from families who are subsistence farmers who live on a few hundred USD per year (or less). Many of the guys trying to make it as runners never completed school and have very minimal education. You will be asked for money. There's a reason there is so much doping there, and a lot of it comes down to massive incentives for those who make it, and a complete lack of education or medical literacy. A single podium finish at a semi-well known race might award a prize more than multiple generations might make in a lifetime.