How ya getting around
Arlington to Everett is a pretty good 15-minute/mile drive. I had my RV based at (AWO) Arlington for many years and lived in the area for 15 years. This transport issue might be a little hic-up in the plan?
There are NO rental cars, as far as I know, at Arlington airport. If the hotel will shuttle you all the better. Other wise taxi service is marginal and expensive and public transport is almost nonexistent.
As far as the fly-in, if the weather is good, it is the best show around. Not too large and not too small. Still has that small flyin feel, but is a good size show. Chance is if the weather is good there will be over a hundred RV's come and go all weekend. When I was AWO there where 20 RV's based on the field alone. The Blackjack RV group will no doubt do their formation flybys since several are based at AWO.
There are all kinds of planes. Military planes do not dominate the air show, like Oshkosh. Nice classics and antiques show up also. There is a good amount of vendors but nothing like Air venture or Sun N fun. However I got a deal on my Aero classic seats, which are the best. They are just down in Oregon.
If you want to take a evening or morning flight to the San Juan Islands I recommend Friday Harbor first. A quick walk into town has lots of shops, restaurant and a beautiful harbor with boats, sea planes and the large car ferries gliding in and out. The scenery is spectacular. Other island/airports are Orcas Island and Roach Harbor. Roach is historic and has an Inn that former US president Teddy Roosevelt stayed at and a nice Harbor. All these airports are within a 15-20 minute walk to town. Flight time from Arlington is about 20 minutes one way.
If you want something fun to do, take the bus to the east side of the airport (free shuttle bus goes from the show side, west side, to the "airport" hanger side of the airport) and get off at the Taildraggers restaurant greasy spoon (or what ever it is called now). Walk down to the Southeast hangers and get along the taxi way and the approach end of the runway (Landing north with good weather, which I hope you have). This is a low-key airport. The show of all the arriving aircraft trying to land Saturday morning is FUN to watch. Also after the show everyone departs and it is fun to watch the Conga line. The bus stops running during the airshow and of couse the airport closes to arrivals and departures during the airshow. Arrival on Friday should be no problem. Saturday morning, watch out it is a Zoo.
There is a nice restaurant just off the field. Again get to the East side of the field and walk south to the two-lane road (hwy531), take a right and walk down a few blocks west. The restaurant is just west of the approach end runway (34). It is a real restaurant, has a patio you can see the airport and has pretty girls serving good food and beer, not over priced like the typical over priced "fair" food you get on site.
Just down the street is "smoky point". A 1/2-3/4 mile down hwy 531 (small two lane road running E-W just south of the airport) there is smoky point blvd (near the I-5 intersection). At this intersection of 531 and smoky point blvd, for all you folks camping, there are three large strip malls, groceries and food.
Nighttime activities are pretty limited at the show site. They might have a plane doing some firework aerobatics, hot air balloons will light up, may be a band will play under the tent and some old movies shown (drive in style) for entertainment.
On the way up or down try to fly over Mount Saint Hellens.
If you go out to eat in Everett get to the waterfront and go to one of the many nice seafood restaurants. Great views and good food.
Enjoy George
(PS No longer live in the area so I can't offer you any hospitality)