Where have you considered? And does your 19 days include travel to/from Europe? Have you already boo

Hello. We are wanting to travel from US to London in July. We have 19 days. We would like to stay a few days in London. What are some suggestions holiday rambler travel trailer parts for the rest of the trip, keeping in mind we would like to see several countries.
Where have you considered? And does your 19 days include travel to/from Europe? Have you already booked flights in/out of LOndon? If not, you'll want open jaws. What is 'we' - a couple, family w/children, friends?
Well, I just walked in the door tonight and my husband sprung this on me. I have been to Europe many times, but only in France, Italy, and Spain. I typically spend an incredible amount of time in the planning, but with work being very busy, I decided to reach out to this forum for assistance.
given that you are starting in London, ending in D sseldorf, the obvious route would be to fly to amsterdam, spend a few days there, and then pick up a car and wend your way gently holiday rambler travel trailer parts down through Belgium into Germany. however, you could just as easily get the eurostar train to Brussels, then do a loop up into the Netherlands and round into Germany.