As stated earlier, Tanzania is a safe and hassle-free country to visit, in general. We recommend booking any of your trips with a registered local tour operator instead of opting to travel independently. As far as safety is concerned, it is advisable to take precautions and follow all government travel advisories to avert any awkward incidents. Terrorist attacks are rare and general crimes like petty thefts, street mugging and bag-snatching may be quite rampant in the tourist hotspots. For more details on safety issues, we strongly advocate you to visit the links below and read the travel advice published by your country:

United State Of America-Travel Advice 
https://travel.state.gov/content/travel/en/international-travel/International-Travel-Country-Information-Pages/Tanzania.html

Canada-Travel Advice 
https://travel.gc.ca/destinations/tanzania

United Kingdom-Travel Advice 
https://www.gov.uk/foreign-travel-advice/tanzania

Australia-Travel Advice 
https://www.smartraveller.gov.au/destinations/africa/tanzania