"From Friday to Sunday I was in Tuscany," or "from Friday to Sunday I stayed in Tuscany." By using "went to", it sounds like repeated visits. You would never use "have been to" in this phrase.

Neither are correct "from Friday to Sunday I went to Tuscany" <--not correct I went to Tuscony and stayed from Friday to Sunday <---correct "from Friday to Sunday I have been to Tuscany" <--- not correct I was in Tuscany from Friday through Sunday. <---correct. I hope this has helped you some. Jerry (English teacher/tutor)

Take a look at this conversation: Have you been away? Yes. I have. Where have you been? I've been in Tuscany. This is all in the present perfect because there is no time mentioned. It's all in relation to the present time, and the fact that you've been away very recently. However, as soon as you mention a fixed time in the past - Friday to Sunday - the tense has to go into the past simple. 'I was in Tuscany from Friday to Sunday.' It's not possible to use the present perfect with a time phrase indicating finished time. To the native speaker's ear it's like trying to mix oil and water - they just can't go together.