MRD - how exciting!! I'm betting the wedding will be held on a weekend when the Gators aren't playing!!
Our wedding was very small and casual. My mother went all "mother of the bride" on me for ONE day - but we took care of most of the arrangements in that one day and then went out for a drink. She wore pants to the ceremony and I thought she looked great. My dad wore nicely pressed new jeans and his two elderly aunts (who were not there) are STILL chiding him for wearing jeans to his only daughter's wedding.
Waldo as a ring bearer scares me. If I were you, I would get that ring appraised when you have it resized just in case he eats it or something!
Look for a bowtie/costumes for the dogs around Halloween - that's usually when the most dog apparel is available at Wal-Mart or the pet stores. I have even seen bride costumes for dogs and that would be HILARIOUS for Rosie.
Good luck with the planning and congrats to the happy couple!