San Francisco, Fiji, Tonga, Samoa, Singapore

Hello dear travelers and readers, I'm doing this round trip up there in September/October. From September 24th, I'll be in San Francisco, USA for five days. From there I fly to Fiji for eight days, followed by nine days in Tonga / Vava'u - snorkeling, swimming with humpback whales. After that, I'll look at how people live in Samoa, after nine days it goes to Singapore for a few days before I fly back. I have almost finished booking the trip with flights and hotels/guesthouses. So the only question that remains is, is there anyone who is in one of these places at the same time and would like to meet, or even do activities together? Or maybe has insider tips? Then write to me. Best regards from Frankfurt Connie