You never can tell what's going to like it round here. The quince trees are in different places - a couple in an area that could get waterlogged and the other two in a more sheltered spot where the soil gets drier. But none of them seem especially happy. Sea buckthorn is supposed to be exposure tolerant but it doesn't like it round here. Four years after I planted some, most of them have died. The apples seem to do alright here - I'm still working my way through this year's crop, and that's from trees that haven't been in long. The oak trees I put in have mostly had a very good year and are growing faster than I thought was possible for oaks. There's a variety of alder, alnus incana, that likes it here, and grows very well, but its close relative alnus cordata just sulks and stays very small. So it's all an experiment. I've got plenty of space so if things turn out a bit different from what you expect it isn't a problem.