Dee,
We have used a TableMate since 2006 when we saw it at Mall of America in the As Seen on TV store.
We use it all over the place in the coach and fold it up and stow it behind the driver's seat when we aren't using it. It folds to about 3" thick. We often put it in front of the passenger seat for the navigator and the legs span the seat base. I bet if you look you can find one for less than the 30$ list.
Matt
Matt & Mary Colie
A sailor, his bride and their black dogs (one dear dog is waiting for us at the bridge) going to see some dry places that have Geocaches in a coach made the year we married.