I guided for Denali Raft Adventures in '02 and '03. We had housing on site - a jumble of old single wide trailers converted into about 10x10 rooms - called ATCOs, and old travel trailers. We also had a main guide house with kitchen, bathrooms, showers, living room, computer, etc. Actually in '02 we just had an outhouse, the flush toilets were the big improvement for '03.
Work was fairly steady from mid May to Mid Sept when we closed down - although if the ice breaks up late you can't guide until the ice dams get blown out. My first season I guided 166 trips, 2nd most at my company. 2nd season I guided about 135, but I also did some managing so I got fewer trips. We did 1/2 day trips, but they really only took about 3 hours - you can cram three or even four into a day - I averaged about 2.3 to 2.6 trips a day. Starting pay when I was there was $35 a trip, it think that is $45 now. Tips averaged about $15-20 a trip.
The Nenana is mostly class II-III with a couple IV's, mostly oar trips (90%), and big water 7,000 to 11,000 cfs is normal. As the water rises it gets to be great class IV then V. By the time it's V they stop doing commercial trips - but you won't forget a guide fun run at 35,000 cfs, it is epic.
Denali is isolated, the nearest real grocery store is in Fairbanks about 2 or 2.5 hrs away, Anchorage is about 5 hrs away. But in the summer Denali gets a lot of young people living there for the summer to guide and work in the park and there is a bar scene, traveling bands and a fair number of people around. At Denali raft everyone chips in for food and once a week or two someone makes the run to buy $1500 in groceries that everyone splits. Works out to about $7 a day for food - which is quite cheap. One night a week you along with two or three others make dinner for everyone, the other six nights a week you get dinner made for you - this works really well. Most of the guides have worked multi-days cooking for guests and do a great job.
If you have a car and don't mind driving Alaska is amazing. Every weekend, or whatever my two days off were, I went somewhere new. This basically meant every weekend was some sort of a road trip. I also took off a week mid season to go and explore. The Kenai Peninsula area was my favorite - and this is where Six Mile creek is.
Six mile is a technical creek with a lot of good class IV, and V in the third canyon. Mostly paddle boats or oar assist. I only got to run it once - it was a blast. Don't know much about working on it. I think you are nearest to the city of Hope, but some guides live in Girdwood which is the only real ski town in AK. I think one of the Denali companies, John White's operation also runs trips on Six mile - Nenana Raft maybe?
I met some of the Haines folks. They did more multi-days but also had a run right outside of town, can't remember the name - the Hulu or something class IV - it sounded great, but they hardly ran it. They also do half day runs on a mellow section of the Chilkat with great views and tons of Bald Eagles. Haines is a small town with a decent summer population. The nearest town of any real size is a couple hours away in Canada - Whitehorse. Ferries run to Skagway everyday, it's about an hour. Skagway is also a very small town that is almost all tourists and tourism based employees, without the cruise ships it would almost be a ghost town, and in winter it kinda is.
There is some great paying, multi-day work out there. A friend guided gear boats for Sobek in the North and got $250 a day plus a cut of tips. Then again he was a 10+ year veteran and the former GM of the place I worked at. It also helps to be handy with a shotgun - the wilderness rivers in Alaska are real wilderness with lots of animals and real isolation from help.
Alaska is epic, go for it. I can't recommend the Nenana vs Six Mile because I only worked at one, but I would recommend Denali Raft adventures as a good company to work for.