Canadian crossing border to go to Texas

[Red from Canada]

Hi Everyone,  We will be travelling to Texas in January with my Baxter cycler and med supplies and medications in the motorhome.  Has anyone had trouble at the border doing this?  I have not been in the US since all the enhanced security and am worried that they won't let me cross with the stuff i need.  The holiday is already paid, so that would be a real disaster.  Anyone with experience doing this have any advice?