Name changed just in case any if the family are on here as coukd be identifying and I don't want it linked to my medical postings etc.
Background - me and DP have been together for 6 years, no MIL issues, we get along very well
DP is joining the navy, as part of his initial training he has to complete 10 weeks of officer training in Dartmouth (literally about an 11 - 12 hour drive from our home). So, I won't see him for 10 weeks
At the end of the 10 weeks training, he completes a parade thing to signify the end of his officer training. Everyone dresses up in their Sunday best and watches their loved ones march about in their fancy uniforms and generally has a jolly good day.
Myself, MIL and FIL are going to the parade. MIL and FIL have decided to make a holiday of it and are going down to Dartmouth for 5 days before and then staying 2 days after the parade. They have booked a self catering 3 bedroomed apartment.
To save on money, they have kindly said we could stay with them after the parade and travel back up the road with them in the car, which is saving us at least a couple of hundred pounds in flights or trains - still all good so far.
EXCEPT here is where I genuinely don't know if IABU or not to book a hotel room for the night of the parade because... Well we won't have seen each other for 10 weeks (you can fill in the blanks here).
MN, what do you think? Wait an extra 2 days until we get back home after 10 weeks without each other or risk being rude and booking into a hotel for a night.
Plus if I book into a hotel its a bit obvious to MIL and FIL what we will be getting up to 
although, we are all grown ups here!!!