I don't have very many photos of Eastgate but I wanted to share them anyway.
I have vague memories of this strip mall being built in the late 60s or early 70s - it was well before Factoria Square. I recall a Cut-n-Curl (I think it was called), a music store where I got a music stand when I played the cello in fourth grade, a Christian bookstore (I remember being given one dollar in Sunday School to spend however I wanted except on candy and purchasing a wood cross necklace and thinking "that's what my Sunday School teacher would want me to buy"), Albertsons, Skaggs, and possibly the Baskin & Robbins. There was also a gas station (Chevron?) off the right side of this photo where I remember getting free Smiley Face lunch bags and glassware with fill-ups. Many of the stores were still there in 1982. I believe the Albertson's and Baskin & Robbins are still there as of 2012!
Bellevue Airfield is written up about halfway down this page of forgotten airfields.
This is the Bellevue Airfield about 1978
From the 1980 Historic Aerials, you can see the strip mall south of I 90 (Freeway running East-West) and the airfield on the upper right.
Visit Kurt Clark Eastgate Walkabout for more on Eastgate.