Yep! Steve welded in bigger Y-pipes after the headers and installed a magnaflow on my Excursion! It's loud at idle!!! Any other RPM and speed it's great! Just the idle is terrible lots of drone! I can a little bit of a difference but not much.
Same thing happened in 1983 at Glen Canyon dam Lake Powell. Diversion tunnels, water blew 300 ft long holes 50 ft deep in the tunnels. They even put 4ft boards at the top of the flood gates to keep the water from topping the dam. Watch all 3 parts of this Department of the interior video on...
Just pick a weekend! You're not going to make everyone happy! I use to live in Atascadero for 10 years. Ive had a lot of great times at that lake. Just pick a date soon. My wife is OCD and likes to have plenty of time to plan.