balfa, I do a lot of this.
A trail feature is the easiest and best choice. That’s not always possible depending on the ground / type of trail / shared access etc. So then you’re into cutting it. A folding saw will take you up to just under 1ft but it’s a lot of work (6″ takes 5 minutes, 10″ takes over 20 minutes). A 2 man bushman saw will cope with 2 feet, it can be a bit of work (depending on the type of wood) but it’s totally satisfying.
If you’re in a hurry / lazy or there are a lot of fallen trees then you’ll be quicker hiring a chainsaw. For me it’s the last resort though because they’re a bugger to carry in on the bike and I’m quite nervous about using them when I’m alone and miles from help. I’d rather spend all day with a handsaw. If the woods are causing problems for access then you’ll definitely be better with a hand saw to keep the noise to a minimum. Winching is going to be noisy too I’d guess although I’ve never done it.