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Features to look for in a hub ..insulated ...removable windows...grommets in the skirt ...good ice anchors ...good tie down straps ...full door . For the most part Clam falls short on most of these features Otter and Eskimo shine . Some of the aftermarket brands have some if not all of the above features . I just purchased an Eskimo 650 XD ...the full door is a game changer . Things you will hate if you try and save a buck ...cheap anchors just suck ..non insulated will be chilly and the wind flap is annoying...straps are superior to cord. Also look at the diameter of the hub poles ...some are very thin. Good luck in the search and purchase. A hub is an investment and size does matter .Buy once cry once.
I use mine for late season elk hunting/spring bear base camp and have had it rained on and it didn't accumulate any moisture but, I also had the buddy heater running in it constantly since the wife and dogs stay inside and at camp during crap weather. 3300: do you not heat your ice house? and how often do you encounter rain while ice fishing?