Four acres isn't big enough to remain secluded for very long. If you're leaning toward that one for reasons of privacy and quiet, take a look at the plat maps and find out who your neighbors are, do a little bit of background checking to try and guess whether they're likely to sell or build in the foreseeable future, and consider budgeting to buy surrounding properties in the future. And as far a trails ... how long could they be? Half a mile max?

Other than that, my biggest hesitation about the house on the road would be whether you'll have to sleep in earplugs every night. My ear canals are permanently sensitized just from motorcycling, and even the softest earplugs on the market sometimes wake me up with pain if I've been wearing them several nights in a row. Custom earplugs would be an option if you sleep on your back, but not if you sleep on your side where they'd contact your pillow and conduct noise.