Yes, you are thinking of the right river. There are a number of other small rivers/spring creeks just outside of Bend. Worth a look at. I will let the Oregon fisher people help you out there if you are interested... Might also check out some local fly shops for info:
Confluence Fly Shop Bend, Oregon
Confluence Fly Shop in Bend, Oregon is the place to go for all your Fly Fishing needs. We offer guided trips on the rivers and lakes of Central Oregon through our award winning guide service Deep Canyon Outfitters. Let our expert fly fishing guides and shop staff help you out with your next fly...confluenceflyshop.com
Edit: Main reason I brought it up is it is within driving distance, a number of choices for smaller water, decent fishing, beautiful area and at least 25 breweries nearby and lots of good restaurants too.
Unfortunately at that time the only rivers open are the met, parts of the D (not the small water), the fall, the crooked (but who knows what it’s going to look like after last summer) and the mckenzie. The smaller streams don’t open till late May.
With that being said, it’s a good time to be on the water