We have been to Trysil twice - once in February half term (UK school holiday) and once in Easter in April.
The quality of the pistes is excellent and despite being a relatively small resort it has some great variety in terms of runs. In April we managed 110km of runs and 10,000m vertical in one day which was a good effort.
It is truly excellent for families at a beginner/intermediate level and while we skied a few of the runs a number of times we really enjoyed all aspects of the mountain.
The chairlifts are modern and quick but there are a lot of t bars too - however you can ski the majority of the resort/runs by sticking to chairs. We really loved the Hogegga runs in particular - these are classed as black runs but realistically are a French red. The only true black run is 45 and is a real battle if it is icy.
The early morning and evening floodlit ski ing on certain days is an absolute must.
We came to avoid the crowds in Europe in Feb half term but in reality it was packed with Danish/Swedish whose own holidays overlapped so do check whether you clash. April/Easter was much much quieter and the snow quality was still really good.
There is quite a lively bar for apres ski and some nice terraces too but it isn't Austria!
We stayed at the Radisson Blu resort and loved the ski in/ski out and the hotel itself is lovely with other activities (swimming, bowling etc) for the kids to do.