There was a popular mod a while back that added border gates to roads leading out of skyrim. Do you think there would be a border gate at Dunmeth pass and Silgrad pass? If there was it would be cool for there to be someone at the gate asking a few questions about why you are going to Morrowind and maybe for them to search you or something like when you first arrive on Solstheim. I just think it would make the gameplay a bit more dynamic and give a reason to try and sneak past the border control officers to smuggle in something like Skooma. It would also allow for having some Redoran guards there to really give the Morrowind feel as you are entering the province.