HOLD ON!!!
I see several summer weeks currently available at Mountainside on Interval International, and that is using my split 1BR (master suite) lock-off unit at Marriott Manor Club.....
That 1BR master suite pulls SEVERAL 2BR Mountainside weeks in June, July, and August, and also several 1BRs of course.
(I also did the hypothetical trades utilizing my STUDIO at Manor Club, and there are several 2BR weeks available in June, July, & August, so my studio gets those weeks too! That's a bargain, my friend! There is a $118 fee to upgrade to the 2BR, but what the heck, it's a second week for you.) Would you rather pay the same maintenance fee and have two weeks in Park City (2BR), or just one week, and always have to fly?
If 2BR units are available now (therefore also extremely likely in future), it would be absolutely insane to buy a single week in Park City, to which you'd forever be committed to fly, and pay a full maintenance fee for only that single gold week.
If you live in SC, buy a cheap resale lock-off in the system to which you can drive, always use without flying, and still have the second portion of the lock-off to utilize for an second week's trade (say another MS week???).
WHY would you want to buy a second-tier season there (gold season), when you can "get in" for far, far less and have something left over?
There are better ways to achieve what you want, imho. Don't be swayed by impulsive motives when a wiser method clearly presents itself.
Instead buy a platinum lock-off somewhere (higher season is still cheap for resale at Manor Club, for example), split and trade, and you'll be SHOCKED at what that platinum week (or two split weeks) can generate, and assuming you mentally split the maintenance fee 2/3 (master) and 1/3 (studio) to value the two split portions, your vacation will only cost you 2/3 of a mf, and maybe even 1/3 if you're able to trade that studio for another summer week at Mountainside, and my bet is that you can, even if using an inexpensive upgrade fee. So, there, you'll have 2 weeks at Mountainside for the one single lock-off week you purchase somewhere else (or use it in some other way).
You don't have to buy Manor Club, but it's worked amazingly well for me. I did it because the platinum week there was cheap via ebay resale....I paid less than $1600 about 3 years ago.
Example: Just earlier this week I traded the two separate portions of my platinum Manor Club week for a July Marriott Lakeshore 2BR week (using 1BR master suite at Manor Club),
and also got a second Lakeshore Reserve week (1BR with full kitchen, not a studio) in mid-June using the MC studio! Best and most luxurious resort in Orlando for summer vacation!!!
Those are two great trades. It also pulled other things, but those are what I wanted. No upgrade fees for either of those, just straight online trades.