Welcome to Oregon! (Im a Hobie 16 owner from medford OR area 2.5 hours south of Eugene)
You are fortunate to have a large and active yacht club w/ several gung ho multi hull sailors. Home lake is just minutes west of town(Fern Ridge Res.) Start at- www.eugeneyachtclub.org/
Now-figure out a way to pack up and get out here by this weekend as this is a Multi hull regatta weekend! check out the event on the website.AArgh!
Also-there's a gem of a high mtn lake(Waldo Lake) 1-2 hrs east of Eugene w/ decent predictable winds high atop the Cascade Mtns- no motor yahoos and u can see down 70-80 ft like emerald bay in lake Tahoe CA Heres 2 more clubs and lakes south of Eugene OR;
(Redding CA) My fav for the Fall season
west of u on the coast-http://www.coosbayyachtclub.org/
SE of you- klamathyachtclub.org/ Very popular Firecracker (4th of July )regatta as soon as you get the boxes otta the truck!
Rogue Yacht Club
'80 H 16