I found a free campsite that I want to bike to on my touring ready hybrid. But the only way to actually get there, after I do a 30 mile bike ride on paved roads, is a mile long dirt hiking trail with a 512ft total elevation change. I have 25mm 700c tires. So should it be safe enough to stay on my bike, or I'd be better after walking the bike to the campsite as soon as I get to the trail?