What is the best package to to do some survival analysis and plots in R? I have tried some tutorials but I couldn't find a definite answer.
Try CRAN Task View: http://cran.at.r-project.org/web/views/Survival.html
I think that it's fair to say that the survival package is the "recommended" package in general, as it's included in base R (i.e. does not need to be installed separately). There are many good tutorials online for this. But you need to be more specific to get a more specific answer.
In an article in The American Statistician, Wolkewitz et al. use packages Epi, mvna, and survival. See Two Pitfalls in Survival Analyses of Time-Dependent Exposure: A Case Study in a Cohort of Oscar Nominees, v. 64 no. 3 (August 2010) pp 205-211. This exposition introduces multistate survival models and focuses on the use of a "Lexis diagram" to assess possible forms of bias.
Survival plots have never been so informative with http://www.r-bloggers.com/survival-plots-have-never-been-so-informative/