Stayed at the Hyatt and Doubletree (in SE and not NE) 2 weekends ago.

Hyatt is quiet and rather nice. Opposite the Belluvue Mall and providing easy access from WA520 and I-405. Hotel is basic but well kept up. I think a rate of $99 is available.

Doubletree (great if you're signed up for the Hilton EWRDC promo) is good. A bit old and rundown compared to the Hyatt but it does recognise HHonors Gold VIP status (got vouchers for a buffet breakfast and canapes which was more than enough for a light dinner). The highway side rooms can be noisey. Ask for a parking lot side room. $79 AAA rate is available.

Both charge $11 parking though you can get away not paying on a Sunday at the Doubletree (no one manning the lot Sunday morning).