Lake Garda:b is a beautiful destination for couples and also for families. Here is a list of things you should definitely try and visit during your stay.
Gardaland: an adventure park perfect for families, friends and couples. There is a free shuttle from Peschiera del Garda train station, leaves almost every 30 mins and takes you directly to the park. Nearby you also have the MovieLand Park and Caneva Water park. It is perfect for a weekend getaway
Visiting Garda is generally great for a weekend getaway: rent a boat and cruise around the lake to visit the cities nearby: Brescia (the biggest city around), Desanzano del Garda, etc.
If you are sea sick - you can take the bus or the train
Pesciera del Garda: rent a bike to do the cycling trail around the castle. If cycling is not your thing, you can walk the trail and enjoy the beautiful views.
Gelato: it is hard to name one gelato place that I liked the most. You can also find all sorts of flavours of frozen yoghurt, ice cream made of yoghurt, personal favorite passion fruit.
Shopping: there is not much high end shopping, so choose Garda lake if you are looking for relaxing holidays and not a shopping spree.
Park Hotel Garda: perfect spot for wedding celebrations, guys get away for golf, perfectly located for a road trip. There were 2 swimming pools, wellness center (hairdresser, spa treatments, etc.) - also available to the public - other facilities also include restaurants, Staff: quite friendly