We took Danielle on her first holiday when she was 3 months old and used her porta cot. I put her in there only once before we went for a day sleep but she was fine for the 3 nights we were away. I did take her normal blanket, sheets and her Pooh light so it felt like home. Since then she has stayed the night at my Mum and used it again and it was fine again. She haddn't used it since that long weekend.

I would set it up and give her a couple of day sleeps in it like Tiggy suggested but I think she'll be fine.