Jammin on the James has what your looking for (IMO).
Major sponsors were Active Thunder and Sunsation among non-boating companies....the manufacturer/owners absolutely love this run. Reggie himself came up to make the run and was probably shocked when his ego was put in it's place for trying to "take over" the event. We had his "cat killer" which was beat by a local 32 skater running 150ish. We have over adozen boats topping the 100 mph mark. We have a 21ft Chapparral and a 23-24 seafox fish boat. We have a couple 1980ish sub 30ft un-restored boats that make the run. None of this matters!!!!
The course is set so that we run to the bay/ocean but don't actually enter in it. We have prizes for farthest traveled (Indiana I think?), most festive crew, and the "Victoria Secrets" award

among others. No mention is ever made (by the organizers) of the fastest boat, nicest boat, best looking, biggest or any other adjective that takes money to achieve.
The event is organized so that there are no surprises. 2 starts letting the faster boats go first (we considered slower first but cannot accept the potential safety issues). A great lunch stop with real food everyone can enjoy. A dock party that is second to none (ask ANYONE that attends, I'll take any bet you wanna make!), A band and sit down dinner that's great.
Everyone walks the docks and becomes an equal. WE only have "prime" slips for the first 50 entrants and it's first come-first serve PERIOD. Don't expect your $500,000 boat to get special treatment cause it's a nice boat, the guy who spent $20K probably spent a larger percentage of his annual income than you did for his ride!!!! The registration day has become a party of it's own with 41 boat with aprox 100 people entering that night. Like was already stated, the participants need to realize it's the people that make these things fun. It's surprising how many boats cruise at 50 or less just enjoying a boat ride for the day (I passed 4,000 rpm's only once as the helicopter dropped in beside me).
So basically, don't cater to the "big dogs". It may keep Jammin from being THE top run in the country, but Hot Boat Mag (before they closed) called Jammin one of the top 10 in the country!!!!