If you are new to green laning any thing will do.
My green laning is mostly pure pleasure - a laugh with a few mates. Occasionally I go out for a serious tear up on my own, but most of it - it's a day out with the blokes. And of those I go out with, there is a complete mix from a 690R to a T reg two stroke 250. And the reality is that although there's a wide range of bikes and also a wide mix in our abilities, we still start and finish together, stop for a fag break together and by and large travel as a group. The quick guys might feck off ahead of the slower guys from time to time, but it doesn't detract from a good day out by any means. So yes - you can have fun on anything.
What you wont have fun on though, is something that's beyond your skill level. And as some of the other guys have mentioned, weight is a real big factor here. You wait until it's summer and the ruts are baked hard, maybe you're in Wales and that Byway has some gnarly rocks and boulders in it that keep grabbing your eyes, scaffold boards built into the slope to step the lane to stop erosion.
A heavy bike for a first bike will most definitely impede on your fun factor, and you won't learn as much on it either. Seen the BM promo videos on the LC GS1200 section ? The guys wheelying and jumping the 1200's are all ex pro / semi pro riders and they have the skill to move a heavy bike about. But they learned how to do it (probably as kids!) on something small and light. (This is why Trials riding is
such a good way to start).
So I've gotta say that I disagree with the comments on 690's, 630's, X-challenges for
you.
You say 'I've been riding heavy bikes for 32 years..', well I'm not far behind you - and it's me day job too!! But after five years of off roading it's only now that I feel sort of able and ready to take a 690 down a green lane with any real sense of skill and ability.
Start small, work up. You will learn more, and I promise you, it'll be more fun.
Don't go bigger than a 400 (and that's plenty). Off road is a
completely different ball game to road riding, and time in the saddle on a road bike counts for very little!
