Well not in the old folks era quite yet....but we usually travel alone....for the majority, hubby & I and most of our units are also 2 bedrooms and up...
we have no grandchildren yet, have two sons one in twenties and other almost 18, so they are into their own things I guess. We invite them and girlfriends or friends to go with us but usually they choose not to....guess we are boring...
We do invite my parents many times and that works out fine although our budgets differ, ours being more flexible, so we foot a lot of the costs but we do not mind it for them. I also travel sometimes alone with my mom, which is okay but she is an avid shopper and I am a beach bum, so can get tiring on me, the driver and all, and again, different budgets. We have a great time together though, just I have to alter my style many times or even resort due to difference in budget and such. We do it about once a year though.
Friends...have invited and invited but lo and behold no one comes through as yet.....they of course would have to pay their own food and such but we provide the timeshare unit, but they all say yes and then either back out at end or somewhere along the line change mind....we used to wait for them to answer us before booking, but no more too many times, yes, yes we want to go but not sure when and on and on, so better we just book and if they want to go okay, if not their loss....now mind you most of our travels are in Mexico so they have to fly here, but we usually drive to the resorts and they have our home to stay with us until we go....oh well....actually I guess it is best as hubby and I do many repeat visits to places and so we have done all the tours and such and we just look for non-touristy things and hang around and we have come to love the extra space LOL....
We kind of like the extra bedroom, one night in one bedroom, next night in the other, change of pace......LOL!