I’ve stayed at Camping Sölden and it was nice.
There wasn’t much going on in the town unless you are there during the scooter rally, bikes go inside the cable car do no issue with ebikes.
There will be large groups going slowly on the blue trails, the view from the very top is stunning, I was millimetres from hitting 2 bulls that were laid down on the Leiterburg trail, so be careful on the natural trails.
Area 47 is 30 mins away and worth an afternoon. Serfaus Fiss Ladis is an hour away and a much more fun bike park.