Sorry to hear of your frustrations with Travel Agents, I've had similar (and worse) experiences so rarely use them anymore. Doing vacation planning yourself is pretty simple, though it does take a bit of homework for the best cost savings.
Sign up for Travelzoo, they come up with some great deals and the concept of the site is pretty cool.
Use points if you can for flights. Airmiles, Aeroplan, Avion, TD, whatever you have. In most cases you're still on the hook for taxes which could be more then the flight! You may be able to use Airmiles for Park Tickets too (sometimes Airmiles has them, sometimes they don't).
If you don't have points, then check Expedia, Westjet, Air Canada, and any other airlines flying into TO etc for deals. Each site has their own "Deals" section to watch. While there, check out their "Flight + Hotel" option and take note of what pricing is (I'm assuming you don't need a car)
Also, check out Disney's site directly for costs. Note that this can be a bit tedious as their site is really poor (ie. checking pricing on the various resorts and hotels can be tedious and not all options will appear) ... you can also package in your park tickets here, though you may save a bit at mousesavers. You can also get airfare pricing, though it's been my experience that the pricing you get is higher then elsewhere but I've heard of people getting better deals.
As long as your staying on Disney property, you can use the Magical Express from the airport to your resort. We usually rent a vehicle for convenience sake (and my DW LOVES to shop the malls ... it's SO cheap compared to Canada). If you do rent a vehicle, then it becomes a bit trickier to find the best deal: 1- Check Expedia for car rentals (note that they don't always show the cheapest ones first!); 2- Go to each car rental company's website directly (their US site, not Canadian), MCO is your rental location (that's the Orlando Airport), check their pricing BUT also check for CITY SPECIALS or other SPECIALS (somtimes obscuring placed on their website) ... you can get some amazing deals .... NOTE: Other people have suggested Priceline and have gotten car rentals for as low as $7/day plus taxes, we haven't tried it yet but we will our next trip!
Hope this helps, if you have any more questions, please ask them!
Have a Magical Trip!!
