If you will be moored for a long time, a second line is needed for redundancy.
I use two lines and run them to the forward hawse pipes. Balance the tension on the two. I never have problems with the mooring lines touching the bobstay.
If you still have problems with the bobstay, leave the backup line slack and the primary line running through the hawse pipe. Instead of riding straight into the wind, you'll ride 30 degrees off the wind, swinging in the wind will be less, and the mooring line will never touch the bobstay. I do the same with my snubber line when anchored. In choppy seas at anchor, 30 degrees off the wind is more comfortable than zero degrees.
if there is an eye on the pendant, do not run lines from port-to eye=to-starboard. Run one line from port-to eye- back to port and ditto for the other side for the second line. You don't want the lines sawing back and forth through the eye.
Most secure, is to use a cow hitch on the eye, running both tails back up to the boat. That assures zero chafing at the point of contact with the eye.
Of course some mooring pendants have no eye on the end so you connect the pendant directly to the boat via the hawse pipe. You still need a second line for backup. Chafing is the number one cause of mooring failures so pay attention to how you connect that second line to the mooring.
Tom, I'm sorry to disagree but a snatch block is not secure enough for heavy weather.