We did a three week rental car and motel trip when my son was almost 2yo and all four of us (two adults, two kids) shared a room the whole time. We saved our driving (about three hours a day) for about 3pm so my son could have a good sleep, then he was fine to stay up with us for a later dinner and we all went to bed about 10pm in one motel room (with two queen beds). When we arrived in a new place we tended to split to have some space. I took DS to the pool/spa, DD watched TV in our room and DP either did the laundry or checked his emails at Reception. We liked being able to socialise with others at the swimming pool. I would suggest you each take turns to have some time most days without the children. Even half an hour can make a huge difference.
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