Diamond M Ranch Resort

Located in the heart of Central Kenai, the Diamond M Ranch is one of the best RV parks in the entire state of Alaska - and that's not opinion, they've been voted one of the best 300 parks in the US numerous times, most recently in 2010. 
They feature restrooms, showers, laundry facilities, plenty of pull-thru sites, tent camping, sewer, full-hookup sites, and they even offer cabins and apartments with river views. You can count on WiFi and cell service in this area as well. This park is open year-round, with special prices for peak season, so they definitely recommend calling ahead of time to see what kind of prices you'll be encountering. There are plenty of trail systems, activities and opportunities for Alaskan adventure at this luxury RV park. 
Your well-behaved pup is allowed to join you at the Diamond M Ranch, but it's quite clear that any disruptive or misbehaving pooches will be asked to leave. You have to keep your pup on a leash at all times whenever they're outside your RV, your vehicle, or your campsite, so please come prepared to leash your doggo. They ask that you always clean up after your pooch in order to keep the park clean, but also to keep wildlife away from the area. 

If you're interested in walking your pup on-site, you and your dog are welcome to explore the paved bike trail that crosses over the driveway, and there's even an excellent groomer, pet boarder, and vet that's available nearby. If you're looking for a bit of an off-leash jaunt for your pooch, then the Tsalteshi Trail system is just a bit of a drive away. Here, your dog can enjoy the lakes and beaches entirely off-leash.