Have you asked the bride and groom what they would like if anything? I remarried at 75 and we too both had houses full of stuff. Took us 3 month to merge what we were going to keep and then had sale of what the kids didn't want. So I dout if this couple will want any stuff. We told our guests no gifts just your presence wil be our gift.
I moved into his house and rented out mine figured a women can adjust to change better than men.