Yes you can fish it , normal ADF&G Regulations apply. Chakok is a tributary of the Anchor River I think. Regs here: https://www.adfg.alaska.gov
Building Information for the Arctic Homes
https://www.ahfc.us/iceimages/manuals/building_manual_ch_02_special_considerations.pdf
https://www.wbdg.org/FFC/DOD/UFC/INACTIVE/ufc_3_130_04_2004.pdf
On the pole barn most of them have gravel floors here that I have seen if they are concrete its a 4" slab like a garage, also most pole barns dont have footers it defeats the "pole barn" idea if it has a footer its a regular structure not a barn..
I would also say that for seismic since Alaska is super active and your coming from Georgia and you have next to ZERO seismic risk consult the IBC residential code 2015 / 2018 or 2020 as a design code. It's not inspected where you will be but building to withstand a quake would probably be pretty wise idea in my personal and professional opinion. Also consult the KPB flood and fire maps like I mentioned before.
UAF has a whole section of their college in coordination with AHFC on cold climate research and design. Google is your friend all that data is free. Here is a sample of the local building code for reference
Foundation TypeMinimum Footing Depth (inches)
Cold Foundation 60"
Warm Foundation 42"
Cast in Place Concrete Pier : 42" (Warm)
Cast in Place Concrete Pier: 120" (Cold)
Minimum Depth of Foundation in non frost susceptible soil is 60"
Notes:
1. Dimension indicated is from bottom of footing to adjacent exterior grade. Required depth to bottom of footing within a crawlspace shall not be less than 8 inches. Basements or crawl space walls supporting more than 5 feet of differential fill on opposite faces shall be restrained as necessary against lateral movement. 2. Dimension indicated is from bottom of footing to nearest adjacent grade. 3. Exterior decks, landings, and platforms attached to the building and not greater than 72 inches above grade may bear directly on ground. Bearing material shall meet other provisions of this code. The potential for and the effects of seasonal freeze and thaw shall be considered. 4. The minimum footing depths may not be adequate for frost susceptible soils. Cold footings shall be founded below the frost line or be protected from freezing with insulation or appropriate means. The effects of seasonal freeze and thaw shall be considered. 5. The minimum footing depth for foundations installed in non-frost susceptible soils may be 60 inches. 6. Non-load bearing site structures not attached to the building, such as fences, light poles, and signposts, shall have a footing depth based on analysis of the vertical and lateral loads on the structure, and shall consider the effects of seasonal freeze and thaw.
Honestly If you are wanting to move here there is alot of work you will need to do. I was kinder than many people by posting this much information, you're gonna have a REAL education I think if you make the move on costs and the hassle of building especially out there. It's a nightmare to get things built in Anchorage or the Valley let alone in Homer