Its all going to be based on if the Sand Point CBSA station will open. Normally it opens May 15, however, the last two years its been closed. It's not clear yet if it will open this year. Anderson's and Zup's will be the first to know I suspect. There has been some discussion of this topic on other threads on this site, in case you want to look around and see what others are betting on.... link to the Sand Point CBSA info below.
Sand Point Customs That said, Andersons's will tow you to Snow Bay (western end of LLC) independent of the Sand Point Customs opening. Thats as far as they can get without having to go into Canadian waters. I did that in August of 2020.
Maybe this year Canada will allow the the outfitters to travel on LLC to access the the eastern side of LLC to get to points in the BWCA (i.e. Lady Boot, Bottle, etc) without going through Customs. One interpretation of the recent changes in boating on border lakes may allow for this...but that would make too much sense. See the links below for info for more details on what I'm referring to.
article 1 article 2 CBSA info BWCA dot com thread on this topic