There is a lot of XC stuff in the Ok Falls area, but nothing in the way of shuttle-able pure DH. There used to be some stuff west of Oliver, but its no longer maintained and is nowadays just a slide-fest (Kobo).
30 minutes north of you is Penticton and three major DH trails; CODE4, Knuckle-Duster and Pancho's Revenge. All three are very shuttle-friendly - the gravel road up is graded like its a city street!
Kelowna also features a few more DH areas, but on the east side of the bridge over Okanagan Lake, if you want info on this as well, check out; http://mtbco.ca/trails/trail-info
Dude - I take that $10.00 and spend it on signs, tools, fuel for saws, oil, maintenance etc., etc. The gist is that it allows you to help kick in a few bucks toward your local trails; and I'm out [at least] two days a week doing trail building or maintenance somewhere, somehow...
The [bike club's] annual budget for trail maintenance isn't exactly huge; I could sparingly spend it all on tools in one visit to the hardware store. Unlike other BC communities with heavy-duty trail 'buy-in' from local government, Penticton's bike club doesn't actually have a 'Trail Fund', we just sorta' work with what leftovers we come up with after doing the annual Bike Fest' and Bike To Work Week. That, along with our membership fees (which are $45.00 per year; $40.00 of which goes to Cycling BC for insurance) funds our trail efforts (money from which I've already exhausted for 2012).
Put into perspective; $10.00 doesn't buy a decent six-pack of brew (that'd be $13.00 for a 6' of Nelson After Dark) so SST's password fee is a "cheap like borscht" way to get access to wads of trail knowledge N/S between Oliver and Kelowna -- E/W between Apex and the #201.