Visa on arrival

Hello all,

My husband and I are going to Tanzania on our honeymoon, and I really struggled with the evisas (this feels very embarrassing to say but true). I also worried about getting scammed online by sites with better SEO and a more professional appearance than the Tanzanian government site.

My question is — if we fly straight into the Zanzibar airport, how hard is it to get a visa on arrival? Husband and I are both American.