I put together a google doc with the topics/sessions so I could decide which session to attend in each time slot. I thought others attending the conference might find it useful too.
There is also a web-page with sane interface where you can set up your own agenda. I can't find it anymore, but it was done with crowdcompass.
Back home where I had a link saved, so here it goes - https://event.crowdcompass.com/rstudio-conf
You can set up your agenda and then export to .ics