1. You can knockout carryover with vacation, but the entire balance of the carryover trip will be deducted from your vacation bank.
2. As for having the last three weeks off, maybe, with a VTO.
You will be giving up any control you have with vacation and a VTO. The scheduler will give you 42 CHs (or 48 CHs as the case may be). Then, if you selected MIN BLG in one of your choices, the line will be built to approx 88 CHs. That leaves approx. 40 -46 hours for the scheduler to build the line. Now, if you want those hours in the first two weeks ONLY, then all your requests will need to be centered around those days. However, that does not mean that the scheduler will have the ability to make such a schedule.
3. What about bidding a trash line, expanding to max hours?
4. Or, try a reserve line and suck up the leveling. We are very fat on all seats, so if you did not want to work, it shouldn't be a problem.