It’s not summer without a road trip, and in my book the best ones include an arts destination. So before your brain shifts into back-to-school mode, consider packing snacks and heading north to one of the many excellent exhibits and shows around the upper Puget Sound. Because it’s the Northwest, you can always pair an arts encounter with a nature excursion — which is pretty much chef’s kiss perfection.You’re reading Art x NW, a weekly arts and c…