Hi, we are due to go on holiday and I am desperately trying to save space in the car, so trying to think of alternatives to a travel cot for my 4 month old. There wIll be a spare mattress in the apartment we are renting, can anyone give any advice on why we would not be able to use this on the floor in our room for our 4 month old? She is currently in a cot bed although she is quite a wriggler she can not yet turn on her side. Thanks.