I have a group of humanoid shapeshifters who live in the swamp. Although potentially irrelevant, they can shift between alligator (American Alligator) and human form either at will with significant concentration and training, or just use an artifact or object to do so. They live in the exact same type of world as ours in terms of continents, weather, and landmarks, with the same materials you'd find in the real-life locations. The humanoids in this case, live in our equivalent to the Florida Everglades. Stereotypical, yes, but it seemed like a decent example. Their numbers are on the smaller side, in the ten thousands with individual groups being in the dozens or rarely the hundreds, and their technological level is late stone age to early bronze age.
It's worth noting that I do not want them to drain the swamp, make artificial land, or anything similar. Leaving the swamp intact is important for their hunting. There is also not any beings that are significantly more technologically advanced to do anything that they couldn't such as giving imports, I don't want copouts. The infrastructure in question doesn't need to be fancy, but should protect them in both human and animal form, especially from nasty bugs like mosquitoes, and should be able to withstand potential flooding and storms without collapsing like wet cardboard.
In conclusion, how would the infrastructure of a swamp society evolve to deal with its environment?
Note: Living in a Giant Swamp - Construction, while very useful, it doesn't fully address some of my concerns such as making the homes viable for both alligator and human, how to keep out the bugs, and how to deal with things like hurricanes. The folk in the Giant Swamp question are also building the capital of an empire with Roman-era technology, which will give them many more resources and options than my specific group, who are more or less building villages, towns, and hamlets.