We are also away in August and have done so in August for the last two years. It's just the luck of the draw sometimes. Couldn't get moored at Horning, (but then we have never managed that at other times), but other than that not a problem really, just be prepared to be flexible. If you want a definite place then be prepared to go earlier. We like the wild mooring spots as we can then be away early in the morning. There is something magical about the 5am cup of coffee watching the mist slowly disappear and then being ready to set off before the rest of the world wakes up. We then moor up for breakfast and showers etc after lots of others have moved on.