It looks like everything is standing, with the option to book a table and get dinner before the show in the restaurant (but you would not have this table during the show - the stage is outside).
There are 4 types of tickets:
1. Ordinarie biljett (ståplats, trädgård) - Standing place in the garden. This is close to the stage. There are outdoor bars and a simple selection of refreshments.
2. Premiumbiljett (ståplats terrass/balkong) -Standing place on the terrace/balcony. There is an ”exclusive” bar with a full assortment, the option of table service, there is a separate toilet in this area. The description says this has the ”best view.”
3. Ordinarie biljett ink Konsertmeny (ståplats, trädgård) - Same as #1, but also includes a dinner before the show (reserved table, concert menu).
4. Premiumbiljett ink Konsertmeny (ståplats terrass/balkong) - Same as #2, but also includes dinner before the show.
For #1 and #2, it also notes that you can make a separate dinner reservation between 5pm and 7:30pm before the show at the restaurant on the hasselbacken.com website.
I have Patrik Isaksson’s debut CD from the late 90s. The hits from that CD were
Hos dig är jag underbar - https://youtu.be/9vN8kodI0AQ
Du får göra som du vill - https://youtu.be/4JdnG6y6UWI
I haven’t been to this venue, but there is a photo of the outdoor area here:
https://hasselbacken.com/sv/live/patrik-isaksson/