I can't help with a quilt pattern called "Anniversary" and I don't have the current Quiltmaker yet, but here are a few simple ideas we have used successfully.
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was made for a 40th birthday. J used 20 gold and 20 burgundy fabrics from my stash, and there are 40 gold diamonds in the borders. The quilting was stipple quilted in only the yellow areas of the quilt so there is an echo of the design on the back. (The cat is NOT mine, his name is Magpie!) The pattern was simple (this was J's second quilt) and the end result was stunning. I don't have a pic of another quilt made for a 25th anniversary of a local community group. I started with a 6 X 6 grid of blocks, and just made the centre 3X3 blocks one single block (like a medallion quilt). A more experienced quilter made the centre block as a picture of the building they meet in, and the surrounding 25 blocks were made by 25 different people, each representing a year of service. Back then (12 years ago) we could not do photos on fabric very well) so the blocks were pieced or appliqued. The outer border was a zig-zag pattern of light and dark fabrics (two fabrics for the past 25 and next 25 years) and I sized it to have 25 points on each side and turn the corners neatly.
Designing an anniversary quilt should not be difficult. If you want to involve people who are not experienced quilters you can use a pattern like J's, but many can feel involved and that they have contributed. Ask 25 people to find strips of fabric to a specific colour scheme. It could be a significant colour to the group, or silver for 25 years.
If you have a core group of quilters you can use them to make major features of the quilt (such as the centre medallion) and ask other less skilled sewers to make HSTs or Fence Rails for borders or blocks. Ask them to make a slightly bigger block than is needed if they are NOT quilters as that gives scope for trimming the HSTs to fit exactly and avoids hurt feelings when blocks cannot be used because seams are inaccurate.
As printing photos on fabric is now relatively easy you could even do that and ask many sewers to add borders to each picture. However if you want to raffle the quilt and raise funds you might be better to avoid pictures in the quilt altogether. Perhaps save the pictures for a quilt to be kept by the church. Is this quilt primarily to mark the anniversary or to raise funds?
Good luck with your quilt, and don't forget to include the story of the quilt and its design on the label to keep the significance of the quilt alive for future generations.
I will watch with interest to see what others come up with as there are always so many good ideas offered.