My 9 month old is staying at her grandparents for the first time on Friday and ive just realised, i don't know what is best for her to sleep in.. can i have some advice please.. we have a next to me which she just about fits in however she is a large and heavy 9 month old and think she exceeds the weight on this.. we have a travel cot that we havnt used yet but not sure whats the safest way for her to sleep as they do not have nursery set up for her with a cot...