I'd be delighted to join the gathering. Haven't really spoken up as my schedule is pretty booked but I will be in town the last two weekends in June. Willamette Valley is pretty great that time of year; I'd expect highs in the 70s.
Unfortunately I don't have the resources at present to organize but I'm happy to help sort out options.
Anywhere on the stretch of 99W between McMinnville and Newberg would make a great base for out-of-towners, however Downtown McMinnville is the place with the charm. Lots of good drives, pick pretty much any road heading north or west and it's going to be a fun trip. I'm sure Chris knows the area best and would have more specific recommendations.
About 45 min from McMinnville is the World of Speed motorsports museum - it's a well done museum with mostly local stuff but there is a vibrant Saturday AM cars-and-coffee. http://www.portlandcarsandcoffee.com/ Unfortunately I think the Porsche themed show is in late July.
Other scenic drives in the area would be - obviously - 101 on the coast and the Columbia Gorge Historic Highway which is a haul from wine country but on a Sunday morning - very well worth it.
Edited by pdxmike, 11 February 2020 - 03:28 PM.