I have made trips with my parents and my DMil & DSil, both BEFORE we were DVC members. We enjoyed both, but there was give and take, mostly DW & I giving and them taking. I would love to do another WDW trip, or any trip with DMil, but she passed away in 2007. We did not always agree on things, but I loved spending time with her (not so much DSil). Even if you have to go by yourself for a while (I did this with DW,DMil, & DSil) or with your DW, taking a trip with the in-laws are worth the investment of time and money.