I think the best thing to do is give parks Canada a call to see if they can provide height/weight restrictions. I have seen small class c units sitting in the parking area watching the rafters load/unload....but not sure what the signs said.
Daryll
2012 Dodge Ram 3500 crew SB 4x4 CTD 3.73
2015 Brookstone 315RL
2009 Colorado 29BHS (sold 2015)
05 Jayflight 29BHS (sold 2008)
99 Jayco Eagle 12SO (sold 2005)