We scanned a cute pic of the couple of honor serving each other cake at their reception for the invitation.
We had an open house from from 1-4 (remember older folks come early/promptly). That time frame is AFTER lunch and BEFORE dinner, so most folks will get the hint. We did it at their house so it was free ('course we had a lot of prep/cleaning/furniture moving to do). We blocked off rooms we didn't want folks in with gold party table clothes hung on tension rods.
We served cheese and crackers; finger sandwiches (cucumber, pimiento cheese, etc.) coffee, tea, water & punch; nuts; tiny desserts--all displayed in tiers with "fancy" fruits (grapes, starfruit, strawberries, etc.). The fancier the display, the less food you need.;)
Instead of a cake, we did pe**** fours (really? Okay "petite fours") arranged so that the display stayed pretty as people took one at a time (a cake is only pretty before it's cut).
HERE'S THE BEST ADVICE: Order wedding flowers from Sam's Club! These were the hit of the party and meant so much to my mother. We pinned the couple of honor, their kids and grandkids with corsages/boutonnieres, placed the bridal bouquet in the foyer and used the rest of the bouquets as decoration throughout the party rooms. (We did the $300 set)
We displayed her wedding dress on a makeshift mannequin.
We sent an announcement to the local paper. You could try to get the paper to treat it as a human interest story (and do it for free).
We made a hardback photo album on iPhoto (not expensive and easy to do) from their childhoods through current. We copied photos from their wedding and other albums, frames, and boxes at Walmart to do this. You may also have slides you want to include. We added narrative/captions. We gave this to them early so they could be the first to see it and then passed it around during the party.
We had a 20 minute long DVD with music playing on a t.v. of the photos from the iPhoto albums plus many candids.
We didn't have anyone speak, but that would be so fun!
Tell everyone you know (who lives near your parents) what you're planning and that you're looking to borrow everything. We got tables, table cloths, chairs, punch bowls, plates, cups, glasses, coffee urns, tiered servers--all at no cost. Some of these kind people didn't even know our parents but were so thrilled to hear they'd stayed together for 50 years they wanted to participate. :thumb up:
Also, it's a good idea to write down an agreement with your sibs. We didn't, so when you read "we" above, it really means "me." My kids and I did all the work and my dh paid for it all.
I HOPE IT'S WONDERFUL!