Hi Meg. I do not know your climate beyond a reputation for dankness, but I live in a temperate rainforest and use hugel beds almost exclusively now after seeing them out perform even normal raised beds. If you have any period of dryness (we get less than 3cm between June-September on average), they will give you about a month of water storage per ft of height where summers a mild. I only water when seeding in the summer, and I grow thirsty plants that can get 4m high and wide.
Another amazing and possibly counter intuitive benefit of hugel beds is that they drain well, after a 160"/400cm of rain last winter, I was getting germination and plantable soil a month before flatland gardeners. I also would bet my soil temperature is moderated by 2-3C from extremes from how they react to hot and cold snaps. I even have grapes that haven't lost all their leaves this winter despite freezes. In addition, the south side of a East-West oriented hugel bed, or better yet a south facing suntrap/keyhole hugel, will get up to 5C warmer than the flat ground, and at 2m in elevation change water will drop out of the air and condense on plants during the summer to help provide moisture.
If you have suitable wood/prunings available, I cannot think of a reason not to hugelkultur. If nothing else, you save 1/3 of your soil costs on raised beds by replacing it with wood.