There are books that you can use for ideas at home. Maybe try and order them from the library before you commit.
Hanen’s Talkability book is for verbal children on the spectrum.
101 games and activities for children with autism, Aspergers and SPD
101 games for social skills. Lots of these require a small group but I think there are some good ideas that can be used for play dates.
I also think the activities in The out of sync child has fun also promote social skills and co-operation, plus they help develop gross and fine motor skills etc.
Like liv we had some group sessions. These were not SALT per se but were run by specialist teachers. They were designed to promote communication and develop attention skills but they didn’t really work that well for us and I don’t think ds got a lot from them though we made a friend which was great. He mostly liked to go but would generally do his own thing. He had just turned 4 at the time.
With our private SALTs, one tried to work with him on understanding feelings. He was too immature for the level she was trying to work at IMO. The other worked on ds following a schedule of activities and developing attention span with some success but it was slow going and very repetitive and these sessions were all £50 each.
I honestly think you can do all of these things yourself if you put your mind to it and do the research/have good resources. I’m just not sure an hour once a week or once a fortnight is really that helpful, if it was several hours a week it would be different. The reality is that most of the work is done by parents in between sessions. This is just my opinion though and perhaps the right therapist (if you can find one) makes a difference. I believe the SALT who assessed Ds could have been good as she saw him about 3 times and had a good rapport with him, but who knows.