Visit your wedding supply stores-I have done a few 50th parties, and made these cute lapel pins:
Little gold bells are purchased. Cut a piece of gold satin ribbon & tie a bow through the loop on the bell. Add a small gold safety pin to the back. As guests enter the party room-have 2-3 of the younger grandchildren (12-14 yrs old), pin them on each guest...just an added touch yet fairly inexpensive.

If many elderly folks are planning to attend-you might want to have a choice of a cake made with a sugar substitute..making sure you have a tented sign saying : SUGAR FREE cake, in front of that designated cake.

Instead of having all dinner rolls-you could bake some specialty breads-like a banana, pumpkin or zucchini-whatever..slice it then use a cookie cutter in the shape of a bell & cut the shapes from the sliced breads. Same goes for the butter-buy a candy mold & fill with butter, chill to set up. These can be made ahead & frozen, then thaw that day.

If you have a good photo of the honored couple? You can take that to a bakery-they can photocopy that onto a sheet cake! This could be on their table as a centerpiece extra..(maybe just have a 10" cake for them to take home after the affair w/their picture on)

Make a little booklet (or scroll, rolled up & tied with a gold ribbon)..to place at each place setting. Contained in the scroll would be bits of data like your mom's maiden name-their parents' names, their 1st date & where they went, the school's they graduated from, their song, marriage date, location, attendants, honeymoon, etc; siblings, children, & any jobs (including the husbands 1st job!), etc, etc. On this scroll the title could be "Through Their Years", or something.