Not really. I started photography a few months back after I started hiking to get at least some exercise . So I hike round the local countyside here in Germany and try and get photos of the birds around here. I keep off the beaten tracks and the camera is allways at the ready, as there a lot of hedgerows and small woods where you never know what is going to be around the next corner. So the camera is generally held or hanging from a Sun Sniper strap (think Black Rapid I think they are like).
Certainly the needs depends on the conditions, so if you are slinging a camera while hiking, sure a long lens won't work well. But others that set up blinds in wilderness-like conditions scoping out birds around a waterhole for example, the long lens isn't really a big issue, you would have a monopod or tripod.