I think you are somewhat missing the point.
Networks have to be worked at, even in the countryside. If you want your friends to go on playdates you have to get out there and work for them ie. go ot Mother and toddlers, speak to people, invite them to your house. Moving into a rural environment where lots of people know each other already (some of these communities can be pretty static) isn't going to help I don't think.
As your kids gets older it is easier if you have an established network as friends from that will help pick up the slack from childcare disasters, provide a sounding board about school etc. If you husband is working from home you will also miss out on him interacting with people at work to build your network.
If you are planning a two year move you will have to do a lot of spade work for v. little long term gain.
I do wonder if you are over romanticising - I'm Scottish, I have lots of friends who grew up in 'rural' locations often on farms - not many of them claim their childhoods were massively superior to my suburban one. There are fewer facilities in the countryside which can be a jawdropping pain in the bottom and the overreliance on the dreaded Tesco in some areas in unbelivable.
My brother lived, very happily, in rural Perthshire for 3 years he hunts/shoots/fish, toodled along to the pub/ supported the village shop but didn't manage more than a nodding acquintance with anyone. Children might help a bit but I still think you might find yourself being viewed as "those wierdies from abroad".
The anti-English thing wouldn't I think be a huge problem unless you planned on driving around in a big expensive car, braying about all your material possessions. Your husbands european nationality would be a plus. The Scots are generally pretty open it is just the English that are treated with deep suspicion. I have masses of English friends and generally it never crosses my mind but I do sometimes run across groups of braying v. middle class, boden touting, 4x4 driving, super entitled financial sector wives in Edinburgh (often in the modern art gallery cafe) which illuminates to me why so many people take issue.
The Scots just aren't very flashy, confident or entitled about certain things. I think the car park analogy explains what I mean very well. I do the same job in Scotland as I do in London (in real terms I get paid a lot more in Edinburgh). In Edinburgh my colleagues/ bosses drive premium marque cars but they tend to be a older, a bit bashed round the edges and are often kept until they are 7-8 years old eg. 04 plate 5 series estates, X5s and almost everyone at my level has an A3 or Golf (it gets a bit dull....) In London almost everyone has a new, shiny, replaced on 3 year hire cycle Mercedes or sports car. My family hatch is pedestrian in the extreme yet I struggle to afford it here so I truly cannot understand how all the others manage it.