For me, I live in Indiana and work in Breckenridge (part time now). The best boot fitters I have personally found are in a shop in Chicago, Viking Ski Shop, on Fullerton Ave. (not the Barrington store). Drew and Denny are the best I have found. I have bought numerous pairs of boots from them with the last four or five pairs being fitted by Drew, prior to that Denny was fitting me. Viking has a contingent of customers from South America that come to Chicago to buy their ski boots and have them fitted.
When I worked full time in Breck and was in desperate need for new boots I could not find a shop in Summit County, CO, that carried boots in my size (23.0-23.5). Yes, I have a small foot, but it is wide (street shoe width EE - EEEE depending on brand) and a narrow ankle, ughhh. I ended up flying back home and going to Viking to get new boots as they had several brands and models in my size. Shops in Summit County said they could order me boots, but could not promise the boots would work for me.
When pushed to recommend a shop in Summit County, Colorado, I recommend Precision Ski & Golf in Frisco, CO. Their staff is employed year around (making custom golf clubs in the summer months) with many years of experience. I have never had anyone come back to me with complaints about the shop. I have had someone I recommended to go there come back and give me a $100 tip for the recommendation after buying boots and having them custom fitted at Precision. Jimbo, the owner and manager of the shop, is a great guy.
All that said, I would recommend researching and finding a good boot fitter close to where you live. If you buy boots while on vacation and then need some more custom work done on them in the future are you going to go back to the location you bought them? If you buy boots near your home it is much easier to have any future work done on them if needed.