I forgot your last question:
There is about five weeks between my big July meet and my big August meet.
After the USA Masters meet (July 22-25), should there be active rest and a short third SPP?
Or should I just do a long taper down from the beginning of July to the Colorado meet?
You have no time to take rest or perform SPP 3 etc. If your body is worn out take 2-3 days of passive rest then get back to work. Train then perform a 10day taper leading into the last meet in August.