Seamless topo maps - USGS

There has to be some way to accomplish this -- up until now I've just treated imdividual quads as inserted PDF, clipped them, and manually lined the edges up. But there has to be a better way to generate a single usgs quad-type georeferenced map that crosses quad boundaries. Any one know of a step by step guide to getting that accomplished?

ArcGIS Online has a topo basemap. Can you use the acad plugin to access it? I think you need an ArcGis Online account.

Also, if you have Map 3D, you can link to the usgs services. Go here: https://viewer.nationalmap.gov/advanced-viewer/ and click on the services link down at the bottom of the page to find the url you need.