A week away

So My partner and I are going away for 5 days and my FIL and his wife offered to babysit for us and im having a really hard time about it I mean I don't want to take him with us because it's a 10 hour drive and when we arrive it will be in the middle of a heat wave but 5 days is such a long time to be away from him I'm worried he will play up for them because sometimes I'm the only one that can settle him (he's also teething) I know he will be fine because they are so good with him I guess I'm just looking for someone else to tell me he will be fine 😪

and the fact I get up every hour at night to check if he's breathing and my anxiety doesn't help 😪