We are coming for a week stay on the cliffs starting Tuesday September 21st. My boyfriend and I want to do some day trips. We were looking into YS Falls, Black River Safari, and the Pelican Bar. I saw that we could do this all in one day or separate with Clives and Alfred does some of this as well. Should we book these types of trips in advance before we arrive or is it not a big deal to do it once we are there? Also, can anyone recommend the best company to go with. Any other great places that you've been that we should check out? We didn't do any trips the last time we were there and we wanted to do some more exploring this time around. Thanks for any and all advice!