We just got ours last week and bought the bed convertor. I will be sleeping on it with my not quite 2yo. It isn't too bad. I fit with bent knees quite comfortably (she is still co-sleeping but hopefully not for much longer). It comes with a board and cushion and the brackets for the board to sit on. The table is bigger than the bed conversion board and the cushion is slightly smaller than the base seat cushions but looks the same. I added a foam topper as it is a little firm compared to the other mattresses and this way I can roll it up if we want to use the table. It works out to be a king single size in width (but conversion is shorter in length). Both table and conversion fit under the main bed. I wanted an ensuite which is why we went with this van instead of a triple bunk.
Target foam topper in queen size cut in half for added thickness
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King single mattress protector and then fitted king single sheet over top (not pictured)
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My children are 11, 7 and a toddler.
We didn't get bike rack so can't comment. We will just use scooters. Will let you know after our first trip how it goes for space but I can't see it being too small. We will live mainly outside and sleep inside. Obviously if we are rained in I may say otherwise lol but not sure any van is big enough for 3 kids for an extended period of time stuck inside!