Bienvenue!!
Let me see if I can help with some answers and suggestions :
Renting a RV is expensive. Prices vary enormous. Can anyone help us with finding a good and reliable rental agency in the neighborhood of Denver?
Yes – it is expensive. There’s a daily rate and a mileage surcharge. I believe you pay $0.25 for every mile over 100 miles per day.
4000 miles over 5 weeks – is 4000 miles over 35 days. About 114 miles per day. So you would want to consider the additional expense.\
Last time I looked there were two rental agencies in the Denver area. But that was three years ago.
Bear in mind you will fly into Denver International Airport and then need to get transportation to the Rental Agency. There should be plenty of Uber and Lyft cars available for you.
We think an RV with a length of 20 feet is sufficient for a couple. I get the impression that 25 feet is very popular. But it seems to big for just a couple. And it consumes more. Any advice in this matter?
Our first RV was 23’ and we were a family of five. I would let price dictate my choice. If you can afford a bit more, then I’d prefer the 25’.
Our National Parks will be easier to navigate as long as you stay in the 20-27 foot range. Smaller will be easier to drive.
Compared with a large car, SUV of something like that is a RV limited in the roads you can taken?
Yes – you may encounter a road in a National Park that says “No motorhomes (Rvs) allowed” or “No RVs over Length X”
You will be able to visit more places if you’re in an SUV or a Van.
Our current RV is a 31 foot Class C and if we know we’re going to need a car, we often rent one at that location.
Lots of agencies talk about standard and additional assurances. What is necessary and what is advisable?
Are you referring to additional Insurance coverage on the RV? If so the rental agency will have some advice.
You may want to call them way in advance and post what they tell you here. Then we can add our opinions.
Is it difficult to find camping places and should they be booked in advance? Further I have seen free camping places (including Wall Mart). What are the experiences with these places?
Yes. I’m sorry to be so blunt – but yes. It is difficult to find places to camp without making reservations.
Many of our Walmart’s out here no longer allow Free Overnight Stays. There are Rest Areas and Truck Stops along the interstates that allow free overnight camping. But we use them only if we cannot find a camping spot.
My suggestion would be to really plan out your trip. And make reservations with campgrounds at each day’s destination.
Camping (caravaning) is very popular here and campgrounds fill up quickly.
I wish you Bon Voyage!