Hi dave61,
Welcome to
Laptop GPS World.
Yes,
ALK CoPilot would seem like a logical choice as GPS navigation software for an RV, since there is no other laptop GPS navigation program that does large-vehicle routing. However, you may have read responses by several long-time users of
ALK CoPilot, who were disappointed by the new version 11. The program was completely rewritten, a bunch of features was removed. Earlier versions of ALK CoPilot had features which made the product unique. With many of the features removed, the program may be easier to learn for a first time user, but people who've used it for years do miss the old functionality.
Hopefully other RV-ers will give you their feedback, but I think
Microsoft Streets and Trips is good at trip planning. The actual GPS navigation may not be as neat as some other GPS programs, but I think as an RV driver, you may need the planning functionality first, and the GPS second. Just my opinion, and I'm hoping some RV folks will tell you what they've tried, and what they ended up using.