Hi Christian,
To further explain our scheduling at Woodsom Farm, it is a city park regulated by the Park/Rec Department. The section of the farm we use is a hay field which explains why we can't access it for the bulk of the summer. We used to have a July launch there when the city hired a farmer to do two cuttings each year. However, the tall grass provides a good nesting site for bob-o-links and some birders were upset that some nests were being chopped up before the hatchlings had fledged.
That pushed the haying from July to late-August or early-September. The field now only gets one cut. By the time our October and November launches come around, the grass is generally high enough to be bothersome but not long enough to cut and harvest.
Many people get their L1 certs in Amesbury. If the wind cooperates, there generally isn't a problem; we have lots of members who are L1 and L2 with a few L3's thrown in. There are always enough folks around who can witness cert attempts. L2 can be a little trickier depending on your expected altitude, level of experience and my nervousness. We love supporting the hobby and our flyers, but we don't want to have an incident that could lose us the field.