Be prepared the Mukilteo ferry can have a 2-3 hours long wait. Unless you know the ferry traffic is very light that day and all the ferries are in operation, I would just drive up north around the top of the island through Highway 20 and down.

Unfortunietly i do not know

20amp should be your standard household plug in.

I don't know. I've seen them from the outside and they are nice looking and very simple. I can ask the rangers when I go there this weekend if you are planning to come from far away!

Regarding cell phone it depends on your providers and your phone. Some of the electronic equipment used at the Navy base when being used is likely impacting some of the fluctuations that take place. I've used three carriers: ATT, T-Mobile and Walmart. The best for reception has been ATT from my experience. Cell reception usually 'goes out' at certain places at the park. One is at the intersection where you turn into the park entrance and as you head a little east for a couple blocks towards Cornet Bay. 95% chance you'll lose reception at the bridge. RARELY I've been able to cross the bridge within the call dropping. Sometimes calls drop just at the south portion as you arrive at the bridge. Other times it is at the middle of the bridge. The third place where it goes out is just past the bridge to the north for about 1/2 to 3/4 mile. Rosario sometimes has reception, sometimes not. West Beach is generally good for most of the time...Bowman is variable. Sometimes, and thinking this must be Navy radar calls drop and zero reception starts about 10 minutes south of the bridge on HiWay 20. Another bad area is at Twin Bridges as you pass Swinnomish Casino. Also, if you go Best Road from HiWay 20 to I-5...with T-Mobile that is TERRIBLE, with ATT it wasn't as bad. When you live here you get used to calls dropping at certain places. T-Mobile is terrible also dropping calls just south of Oak Harbor a lot of the way to Coupeville as many times dropping calls all the way down to the ferry. This has been my experience!

We used the "HotSpot" on our phone. The signal was very good!

I have used the parks amenities; fished, hiked, bicycled, canoed,and picnicked. I live nearby and have not camped in the park (my backyard is wooded). I think I'd prefer Bayview at Bowman Bay with nearby water access and great hiking trails.

Wonderful views! No. Oat necessary, tight off highway 20. Enjoy.