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You have a real nice problem ahead of you. If price is no option - then you would look at an Otter system. If you want to save some money and get basically the same system, then you are in a Clam or Eskimo. Your Rav4 may not be able to fit inside, so you will have to look at either a trailer or a hitch mount support to load the house on. You need to decide if you want benches or chairs. Otter offers the Pro series of their houses. These are the ones that have the chairs. You said you are in Canada - I am in MN and would always recommend the thermal units. You are already spending that money, and the insulated units will stop condensation from raining on you. I have the Clam Yukon Thermal. Love it. It is lighter than the Otter units. You are looking at the Cabin, so the Clam comparative would be either the Legend or the Nanook. Eskimo is coming out with some new models, but I haven't seen those in person yet, so will let others comment on these. Since you mentioned that you will be building a Smitty Sled - which is a good idea, it will get the sled out of the snow. The weight difference is still an issue, but the sled will help. How far you intend to walk in and pull will be a big factor on what system you decide to buy. Good Luck!
Looking like the interior dimensions of my Rav4 with the seats down are L 70" W 42" H 34" So that otter looks like it would fit like a glove! Keep the input coming, i really appreciate it. Our local wholesale here has a Eskimo flip, but the quality of it looks iffy to me, all the red plastic joints/pieces are cracked in the display model inside the store and that scares me for buying one new, and using it out in the cold....Anyone with any Frabill Aegis Experience? I dont believe they are thermal and its looking like thats probably the way to go.
I ended up settling on an Eskimo EVO 2IT crossover. It was about the best thing i could get semi-locally, along with the cover. Lots of room and some pretty good reviews here on the shanty. I likely wont have a snowmobile/quad in the next 5 years to really get me out to laker fishing here that requires true run and gun. But this thing should suit my needs for a little while. Thanks for the help guys.