There's a municipal park with campground with full hook-ups on a lake in Issaquah, just off the interstate. Can't remember the name, but you can google it, as it's the only one in Issaquah. There's a low-looking railroad bridge on the approach, but it's got adequate clearance. We were a 38' DP towing a 4-door Wrangler 4 down with about 12.5' height. Didn't even hit the antennas. The park had nice views. 10 minutes to downtown on I-90.