Hi guys
I went to Lord Howe last year at the start of August for two weeks and had a great time.
I took all my own gear - JP 101 FSW and 77 Fanatic Freewave + 4.2m, 4.7m, 5.7m and 6.7m sails but if I do get there this year I would just hire gear - it's really good gear. Got over there last year via Macquaire Air. The 12 seater plane was turned into a 3 seater packed with windsurfing gear in the packed (floor to roof). Great adventure and perfect flying conditions. About $900 return with gear but not sure what prices are around this year for this option, could also consider the boat for gear.
Great flatwater blasting, bump and jump and waves in places. In the one run I could go from dead flat water into 1m swell and then into waves over a couple of kilometers. We had unseasonally light winds last year so only got 8 days of 10-30 knots, mainly 15-20 out of 13. Other days spent snorkeling, swimming and feeding fish at Ned's beach and relaxing. Great social nights/dinners.
For speed, bump and jump or freestyle it would be a great spot. Waves would also be good for the more adventurous around the reefs. I had a 3/2 wetsuit and was never cold after 6-8 hours on the water and I'm from central QLD.
BTW for the family - snorkeling, round island trips, feeding 1m kingfish in 0.3m water, lots of walks, get around the island on bicycles and quiet but social nights. (Last year there was a family with two kids and I think they had a pretty good time). Beach is great.
That's a 4.7m in the photos.