Often, local parades will have decorated bike contests, which you decorate and then get to ride in the parade!
Locally there are several supported including the Fabulous 4th Metric Century in Tryon, NC, and group ride happening all morning on Monday. The 4th is a good weekend to get out early to beat the heat and stay ahead of the plans you may have!
A couple years ago I employed my xtracycle to tow everything to a cookout. It included a cooler, watermelon, chairs, blanket and snacks. With flags taped to the back of the xtracycle. It was very fun, and folks were interested in the whole feat.
Try to be more visible and utilize more lights and bright clothes on holidays like this one. Cook outs and BBQ’s normally include more drinking and driving..