Hi there, I have only been to Misool Eco Resort in RA and went also in the end of September. The seas were not flat but still manageable at all dive sites. There was a steady breeze during the trip, which was actually very positive to keep the tropical temperature a bit more manageable for us. The roughest day's dive was at the open sea Magic (Manta) Mountain, but still OK on the surface and perfectly fine underwater. The benefits of this time seem to be the larger fish life - we had mantas at multiple dive sites and 10+ at Magic Mountain. Vis was still quite good, not crystal clear but still good enough to see across the entire site which was about 20+ metres. For the house reef you certainly get a good choice there, very convenient and no currents that I can recall. We saw black-tips, turtles, octopus and more little critters than we could count. If you really wanted there was another dive site across the little channel at the neighbouring island if you really wanted to avoid the boats and didn't mind a short snorkel to get to the site.