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I have no doubt you'll love your RS Alps vacation!
The breakfasts were absolutely outstanding! In fact, I do not ever recall having a breakfast an American hotel as wonderful as every single one we had in Europe. Always an incredible assortment with European favorites (they would sometimes have vegetables on the morning buffet which I don't see in the US) along with every imaginable offering such as bagels with smears, crepes, eggs, meats of every kind, muesli (porridge), granolas, fruits, yogurts, omelets, hash browns, pastries, muffins, juices, coffees, etc.
I consider myself a foodie & took pictures of all the buffets but we are unable to post photos here, unfortunately. It was usually a beautiful set-up (in particular, the hotel in Bolzano, Italy!) I only wish we had more time to eat the morning meal. Even though we were belly up to the door when they opened, our time was often short so we could get out the door and enjoy the sights and offerings of the beautiful towns. It all worked but there will be no sleeping in if you want to enjoy both breakfast and get the most out of your day for maximum touring.
The heat & little AC : So, when we arrived in Salzburg in early June 2024 for our RS Alps tour, my first thought was "Oh, no - it's cold and we didn't pack enough warm clothing! Guess we'll just have to purchase some wonderful European outerwear and gorgeous sweaters! :) " However, the 1 lightweight jacket we each brought was plenty for the first few days of our trip where it was, indeed, pretty cool. I had some pretty scarves (one of RS handy tips I learned - they don't take up much room and are always a nice touch to upgrade an outfit!) which helped, along with wearing layers that we could peel away and tie around our waist as the day got warmer. Mostly took sleeveless tops, mid-length pants and lightweight sweaters. Only a few of each. You'll be wise to adhere to RS advice about no overpacking! I regret taking too much & I repacked several times. For instance, never needed the sandals brought even though they were sorta athletic. The streets were cobblestone in several areas & my ankles were at risk in sandals. Not again. Sturdy, practical shoes in a muted color for me. So, after Austria we headed to Italy. The Alpi di Suise is VERY chilly even in June. I've written in some of my posts about how we had to purchase hats, gloves, etc once up the gondolas because we would've been miserable in little jackets in MUCH higher elevations & colder temps had we not. So, when we left the hotel it was probably in the high 60's but that was in the valley. The UP UP UP of reaching the meadows in the Alps dropped the temps dramatically. Don't underestimate the diverse temperatures in this amazing Alps adventure. Layers & preparation for your particular day -don't forget the sunscreen. So, we didn't need AC in Austria, we had AC in Italy, no AC in Bavaria but they provided fans and it was very comfortable at night. I don't recall ever not being able to sleep in any of our locations due to it being hot. In Wengen, we were told the "Alps are your air conditioning" and they were right! There is something about having frozen, snow-covered mountains just outside your window that make it feel amazing! The day it reached 90, I was not very hot. I was wearing long shorts and a lightweight, sleeveless top and sunscreen (28 euro in the Murren gift shop - bring your own for less $) and felt fine. Our Swiss hotel Regina in Wengen didn't have AC and we slept wonderfully. I brought a little sound machine on the trip with me. If you are accustomed to the noise of a fan in your room at home, get a sound machine in US.
In Chamonix, we had AC but I don't believe it was very warm in France - drizzly most every day.
Had excellent service getting to the airport from Chamonix using Mountain Drop Offs. RS recommends a couple services. All good.
Always happy to answer more questions!