We stayed at the Mount Pleasant a couple of weeks ago. The owners were very friendly and helpful – well used to mountain bikers and BPW: They stored the bikes for us no problem (even offered us the use of the pressure washer), we had a big, comfy room and the food was good. It’s a bit like staying in someone’s house, though, if you’re OK with that.
If we were going again, I’m not sure if we’d stay at the MP or look for a cheap room at the PI (particularly since reading above that they are OK with taking bikes to your room). That said, if you take the cost of breakfast into account (it’s very good at the MP), there’s probably not much difference in price.
(Parking at MP is on the street, but it’s pretty quiet, and there was plenty of space when we went.)
It’s a viable option!