If you’re sticking to the way marked trails, then probably Hopton. It’s more immediately gratifying but the climbs are steep, so if you’re not fit, you’ll be off and walking a lot of them!
Verderers at FoD is ok for the first couple of times you do it, but it gets boring quickly. The Freeminers trail is a lot better, more varied, more natural feeling but still won’t excite if you’re after thrills.
I’d be asking nicely to get a guide though personally… The off piste riding at both is way better than anyone would ever know if they’ve not done it, but then so is the Wyre too. In fact, the Wyre is (for about 2-3 months of the year when it’s just about dry enough) my favourite place to ride and right now I’m in there 2/3 times a week!