We would stay in the Trailmonor without unhitching on overnite stops getting to other camping destinations. Also, we would open up the TM for lunch or to retrieve needed items on the road.....my planning wasn't always the best.
If someone never anticipates opening up the TM without unhitching, then setting the canoe far forward is not a problem. Even if the need arises that you do need to raise the TM on the road, unhitching is probably easier than moving the canoe. For us, leaving the canoe in place, not unhitching, and raising the TM was the best option for those times that we needed to do that.