I liked the first one I made of these, so figured I'd give this combo another try. I think this one is a bit trickier than the previous one, but that could also be caused by the fact that this one took a lot more effort to get to work out in a way that I liked.
I haven't been able to combine Land and Sea with any other genre satisfactorily. I like it here because it replaces a clue type completely while in others it just comes over as merely an addition.
Rules for Country Road
Rules for Land and Sea
This one solves as a normal Country Road puzzle, with the addition that the loop can't run through more than 2 white squares consecutively.
[Edit: Fixed a uniqueness issue. Somewhat major, but quite easily fixed luckily]