visit Gorges du Verdon

You will definitely need a car for Gorges du Verdon, unless you book a bus tour. We stayed at Auberge du Point Sublime, in Rougon. Cozy little hotel with bar and restaurant, friendly staff. Walk across the road and you have an amazing panorama into the gorge (Point Sublime). A short drive up the hill, and you are in the tiny picturesque village of Rougon. If you want a bit more civilization and more hotel and dining options, try Moustiers-Sainte-Marie. But, as I noted in another thread on this forum, be careful about driving at night in this area. the roads are very narrow, with minimal markings or guard fences, and steep drop-offs. Consider allocating more than two days in this area - there's a lot to see. No suggestions for wineries - not my thing, and driving while buzzed is a really bad idea on those roads.

Hi!

The only way is by car. Coming from Nice, it makes sense to stay towards the east of the Gorges. The Chateau de Trigance is a lovely place to stay; there are other cheaper hotels in the village of the same name and in Comps-sur-Artuby. Or, right in the Gorges, there is a hotel at Point Sublime (north rim) and one at Cavaliers viewpoint (south rim) - the latter having mixed reviews.
Otherwise, at the far western end you have Moustiers, a beautiful village if a bit touristy, and furthest from Nice.

There aren't many wineries in that area; you'd have to go further south. There are some around Aups, for example, but I have no specific recommendations and - broad generalization, there are certainly exceptions - I would not expect to be blown away by the wine, the area being mainly known for rosé.
This being said, you can probably tour some of the villages south of the Gorges (Tourtour is beautiful, for example, and so is Bargemon) and combine that with a winery.