That's the beauty of predator calling, you call them to you. Heck no you're not too old. I can't think of a less physically demanding type of hunting, short of shooting prarie dogs off the hood of the truck!
You drive to a good spot, walk far enough to get the truck out of sight, and call. I once raced up the side of a small hill to call, trying to beat the incomming downpour and get one last stand in. Parked just below the crest of the hill, got out, dropped over the other side and planted my butt under a cedar. She came in after 20 minutes of calling. Shot her 30 yards from the truck.
The secret is scouting the area beforehand. Find the good areas to call, where you actually want to sit and call from. From there, go as far as you need to be out of site of your "stand", and that is your parking spot the next time you come through to call, the next day, or weeks later.
I spent all last summer with my 10 year old hunting by doing this. First 3 or 4 stands in the morning, then the "too hot to call" mid day hours were spent mapping out the evening (and the next morning's) stands and parking spaces. Then 3 or 4 more stands towards evening.
You can move quickly from stand to stand doing this, it requires little walking, and is very productive. I know guys who don't scout during non hunting hours, and hunt all day, and they might get a couple more stands in than me. They're also less productive as the best hunting hours are spent searching for places to park, and hunt, instead of using usually non-productive hours to do it.
The scouting is important though, otherwise you could end up walking a ways searching for places to call from once you park. Topo maps help alot.
