Will a display actually survive the east wind out here?
Yes, if it is attached for the conditions. The failure mode in Washougal is almost never the lights and almost always the fastening — ends of runs, corners, and anywhere clip spacing was stretched. Installed with spacing appropriate to Gorge exposure, a display holds. Installed to a generic standard, it does not, and it usually goes on the first serious east wind night in November.
Should I expect to pay more here than in Vancouver?
For an equivalent roofline, somewhat, and for a defensible reason: Washougal exposure needs tighter clip spacing and more attention to the ends of runs, which is more labour and more material. Anyone quoting Washougal identically to a sheltered street in town has not accounted for where it sits in the Gorge.
Half my strand went out after a storm. Is that the lights or the install?
In Washougal it is worth checking the connections first. Wind-driven rain moves horizontally and gets into strand junctions and cord ends that would stay perfectly dry elsewhere in the county. That is one of the things our service warranty exists for — if something stops working mid-season, call us and we come back out rather than leaving you on a ladder in December.