Here is a proposed structure for an article about Maeda Forest Park and its barbecue area:

Green Escape in Sapporo: The Green Oasis of Maeda Forest Park

A vast natural expanse at the city’s doorstep

Briefly describe the park’s location, its vast area, and its preserved natural setting in the midst of the city. Mention the meadows and hillsides that can be admired here.

Abundance of outdoor activities

Present the various activities possible: picnics, ball games, kites, model airplanes... Emphasize the ideal setting that this vast green space provides for outdoor leisure.

The star of the show: the free barbecue area

Highlight the barbecue area and its facilities (designated dining areas, available grills, water points, toilets...). Provide some details about its operation (reservation, opening hours, small refreshment stand...).

A natural haven just steps from the city centre

Conclude by recalling the ease of access to the park from Sapporo’s center and the value of this natural “breath of fresh air” in the heart of the city for airing out and rejuvenating. A humorous nod can be made to picnics disrupted by the determined crows.

Feel free to add or adjust according to your preferences! I’ve tried to provide a dynamic structure highlighting the main assets of the location.