>It looks like reservations can't be made until April 1st, is this right?

Correct, and by April 2nd all the nice locations / weekends will be booked solid

>Has anybody ever been to Osoyoos Lake?

Yes, but not to camp. You may want to post this question to the Canada Forum.

Some other nice parks:

http://www.env.gov.bc.ca/bcparks/exp.../rathtrev.html

http://www.env.gov.bc.ca/bcparks/exp...s/miracle.html

Cheers,
Geoff Glave
Vancouver, Canada