Update: Just got back from the trip, and thank you all for advice on places to check out and restaurants to eat at. Visited Multnomah Falls with the shuttle, the Oregon Zoo, Rose Garden, Japanese Garden, Powell's, OSMI, Pittock Mansion, Chinese Garden, the food truck pods on 10th and Alder, Saturday Market, and some of the events being held while I was visiting. The Chinese Garden was kind of a letdown compared to the Japanese Garden, but other than that very nice places.
Restaurants: Tried Waffle Window, Aybla, Ruby Jewel Scoops, Kennedy School, a bahn mi from some random food truck on Alder's, a couple of places in Vancouver (friends picked me up and showed me around), Bamboo, Bollywood Theater, Pine Street Biscuits, Salt and Straw, Voodoo Donuts Too (there's a second, less congested one in the NE area), Blue Star, and Ringler's, and for most meals I just cooked at the airbnb. Everything was great, and I'm sure some of the places I didn't hit would have been too, but a lot of it came down to what was nearby. Personal take on Voodoo vs. Blue Star: Tried the Mexican hot chocolate doughnut from both places. Voodoo had a bit more spice which I liked, while Blue Star was overall better tasting. I think they're better for different things. Blue Star is nice for eating one outside and sipping a drink, while Voodoo is better for grabbing a big box to bring to family or to events. But Voodoo definitely isn't worth waiting in a line wrapping around the block for. The second location has basically no line, though I heard it can get crowded after work hours.
The tech meetups were productive. Met with people in the field and they gave me advice and connections. I'd really like to live up here, though the rising cost of living, and the increased competition from code bootcamps (I was told that it's basically a pipeline for Jr. Devs and that applying from out of state will make it difficult) makes me wonder what I should do. I have a couple friends in the area who'd love for me to come out that way and I want to, but it seems like my choices are move and hope it works out or stay here and apply and hope someone actually hires me. That probably deserves a new topic, but thanks to everyone for advice on where to eat/see/not spend tons of money (grand total for the trip was $1225.10, which was only slightly over budget)