Just like needing to accommodate guests' food allergies and dietary restrictions, you'll also need to take into account any party goers physical limitations before your big day. Whether you have an aunt in a wheelchair or a college friend temporarily on crutches, you want them to enjoy your wedding and not have an awful time getting around. Here, a few ways to accommodate a guest who is disabled at your ceremony and reception.
First you should make sure that your venue and any location of the celebration is accessible to people who are handicapped. This might be something worth thinking about before you find your dream ceremony and reception space. If they don't you can build or rent a portable wooden ramp. Restrooms are also key. They need accessible entrances and at least one handicap stall. If your venue has multiple floors make sure there's a spacious elevator. If you're unsure of your loved ones's needs, it's never a bad idea to check with them first about what they require.
As for seating, have an usher at your ceremony reserve aisle seats for easy and comfortable access. If you do have a guest in a wheelchair, make sure that their table at the reception has one less chair. You'll also want to make sure that there's plenty of space between tables for them to move around.
If anyone is hearing impaired seat them up front at the ceremony and closer to the dance floor. You may want to have a sign language interpreter if that's important to you or braille in your program books should you have a guest who is blind in attendance as well.