If you hire a car in the UK, then I would definitely recommend buying a Satnav, which you can now get for about £80.
I have no idea what you call them in the USA, but just pop into any large outlet of our three main Supermarkets ( Tesco, Sainsburys, Asda) or somewhere like a Halfords (supermarket for car parts and bicycles) or John Lewis (UK's most popular Department Stores - they're all over the place) and ask for a Satnav.
If you are travelling here and there through Europe, you should ask for a Satnav that covers the relevant area. They may be £20 or so more expensive, but you can take it with you and in theory, never get lost.
In the UK, when loading in your next destination, all you have to give it is the relevant postcode (you call them zip codes I believe), and the gadget will guide you to within about 30 feet of your destination.
Our postcodes cover the entire UK, and each indivual one covers a very small area, which includes no more than about twenty or so houses in a Street.
All you need is a postcode and the house number, and you should go from a to b without any hassle.
Just a question......have you ever been on vacation in one of these?.........
It was just a thought I had last night, because if you are not averse to "caravanning" (they are called Caravans over here), then you can get into every nook and cranny of Britain (and Europe), for very little money (compared to Hotels etc).
My family and I toured right up the east coast of England, round most of Scotland and then right down the West coast of England in one of these, and had a spectacular holiday.
There are two main Clubs that have hundreds of sites all over the UK, and we found them to be immaculate, with very friendly staff and wonderful facilities.
We found the most unusual places with a bit of research, including a few nights right by the water's edge of Loch Lomond.
Another was just round the back from the world famous Edinburgh Woollen Mills in Moffatt, who had a restaurant attached which served an amazing breakfast each day.
Nowadays prices would probably be about £30 a night at one of these sites, and would include electric hookup etc., and the vast majority of sites have full laundry facilities and loads of hot showers (never saw one less than spotless).
The sites are usually well stocked with fellow travellers, and during our time on that trip we met up and spent many a great evening with people from all over Europe.
It's a brilliant way of getting to know the country.
Holland are also into caravans and have many sites, as does France. I've never toured further than that so if you're interested, maybe some of our other members will have more info about their particular country.
Sell the car and caravan at the back end of your trip, and it should work out much better value over all, compared to guest houses and Hotels.
Worth a thought, anyway.
Tip.....make sure your trip ends up each year somewhere near the Spanish Mediterranean Coast for the winter months, seeing as you probably want to keep away from cold weather for a while.
If you're interested, here are the websites for the two main clubs in the UK.
Personally I preferred the (1) Caravan and Camping Club out of the two, but that's just my opinion.