Have you been to Kranska Gora? Is it worth us going there? We will have a car.
Yes, we've had a holiday based there in the past too. It's a good base for walking - maybe better than Bohinj even - and again there is walking suiting all abilities.
Hikes to the "3 Borders" and into the valley behind KG are good too for slightly less-strenuous options, there are waterfalls nearby to visit and there was a cable car from KG into the mountains with a relatively easy path to a nearby summit.
Sorry, it was a while ago and I can't remember all the names of the summits/walks, but it should be fairly evident if you have a map and/or guidebook. Anyway, the whole area is beautiful so you should be fine.
There's also some good hiking from the Vrsic pass, which should be accessible by car if the road is open (no snow or rockfall!) and which is spectacular as drive, let alone a hiking destination.