Hotel room dilemma

[newfamilydilema]

I am sure others have had this dilemma. First holiday with new DP, myself and DD(13). For most of the time we will be in a holiday cottage with two bedrooms so no problems. For one maybe two nights we need to pit stop in a hotel such as an Ibis. If we were a non-blended family we would book one room and any moaning from DD would be ignored. But DP is not her dad so I understand that both of them maybe uncomfortable with this, however, I am uncomfortable with DD being alone in a hotel room in a foreign country. I have looked at the locations and there are no proper suites are, they are just larger rooms, but no division of the room.
DP and myself would normally sleep naked, but in a shared room with DD we would wear bedclothes. I don't want anyone to be worried or uncomfortable. DP will do whatever makes DD happy even actually if that meant him being in a single room, but again that seems to be setting a precedent that he is not truly part of the family.
What have any of you done in this situation?

DP wanted me to share a room with him and 15 year old DSD and 13 year old DSS on holiday last year, along with our toddler, while I was five months pregnant...he refused to accept that it would be uncomfortable for me and probably for his children too, didn't trust them to stay in an adjoining room as he thought they were too young, and didn't want to pay for an extra room either. I was also accused of being deliberately awkward and not putting the children first, all because I didn't like the idea of sharing a room with two teenage stepchildren!

In the end, I just stayed at home with our toddler and missed out on the only holiday that year, which I suspect is what DP wanted all along anyway, as he tried to sell it as a family holiday to me so that I would agree with spending our limited money on it, but what he meant was a holiday for him and his own children. Sorry for the rant, clearly I'm still bitter!!