Hale Koa is a government-owned R&R hotel operated for military folks. (I'm retired from the Navy.) Hawaii tends to be higher maintenance fees (MF) than a lot of mainland resorts. That's why I think it's generally a better idea to buy in Hawaii if you intend to use it. Exchanging it out for another resort, especially back to the Mainland, may not be the best investment for the fees being paid. I think if someone wants to stay at different resorts in Hawaii, a Points-based ownership is a better idea. That way they can book what they want wherever they want to go. For me, the only way it was cost-effective to own in Hawaii was to stay at the resort I owned. No extra money spent for the vacation that way. As I said above, I gave up my Imperial week when I figured out it was cheaper for me to stay at the Hale Koa.
As to how I gave up Imperial, I put an ad on the Tug Marketplace, and also in the Bargain Basement forum to give it away for $1.00. I had purchased it on eBay for just a few dollars, and used it several years. So giving it away didn't cost me anything. I had a taker within a very short time, and they paid the transfer fees. There is a company called Legal Timeshare Transfers (
http://www.lttransfers.com) who are Tug members and very highly regarded, that handled the paperwork. It was very easy.
If you're thinking of getting rid of your Imperial ownership, it needs to be paid off. If you have a loan against it, that will be a very difficult process, because the resale value is very low. The Imperial has a great location, and is a fine value for someone who understands what it is, and isn't. The big thing you don't want to do is pay a third-party company money to sell it for you. Those kinds of companies are generally only there to take your money from you, and they have zero incentive to actually sell your timeshare. Stay away from them.
As you explore your way around Tug, check the various forums and read as much as you can. This site is huge, and there is a LOT of information here. People are friendly and helpful. So take a seat and keep reading. If you decide to join the site (it's something like $15 a year for a membership) you'll have access to member's only areas that will help you get more from the timeshare(s) you may own.
Dave