Because the dollar has been better, I'm trying almost every variation and permutation of buying park hoppers. I *think* I'm happiest with the 5 day park hopper prices offered by expediafortd.com (I have a TD Visa) but I'm worried I'll get a voucher to redeem at the gate instead of an e-ticket.

Does anyone have any experience with this? Will I get a voucher by email or something that will prevent me from making fast pass reservations?

I'm going in October. Will I get my voucher very late or just before I leave? I have so many unanswered questions.
Since I recently bought
Disneyland tickets through TD expedia, I figured I'd post my experience within this thread (even though you've already bought your tickets through CAA).
In mid June, I used airmiles to purchase one 5 day park hopper. As reported elsewhere in this forum, airmiles sends out the little tickets which are ready for use (just go to the entry gate, sign ticket, and get photo taken). My airmiles ticket arrived via courier about a week after I purchased it. I'm not sure if it came by courier because of the potential mail strike, or if that is standard practice when airmiles sends out tickets.
On the same day, I purchased three five day park hoppers on TD expedia. I was able to print out the "tickets" at time of purchase, so nothing was sent to me in the mail. On August 2 (the day before we flew to California), I confirmed that all the info was still stored in my TD expedia account, so had there been a problem (say, I lost the papers) I could still reprint the paperwork in California.
The three vouchers had to be exchanged for tickets at a ticket booth, but this was a fairly painless process. Maybe took five minutes total to exchange the vouchers for tickets.
*****
To me, the big advantage to buying through TD expedia is the 4.5% "rebate" I received through my credit card. Immediately after buying my tickets, I checked out the exchange rate at the BankofCanada website, and it appears we received the exchange rate in effect at that moment, with nothing additional added on (i.e., I didn't have to pay an additional 1.5% over and above the bank of Canada exchange rate).
After five days, we converted the four tickets into annual passes. One interesting thing (which confused the Disney employee for a minute or two) is that we received a full $335 credit for the three Expedia passes, but only a $315 credit for our Airmiles ticket. Presumably, Airmiles bought tickets when they were cheaper, and the lower amount of $315 is the credit I received for that ticket.
Basically, in view of the 4.5% rebate I receive from using the TD Expedia website, I think the site is an excellent way to buy "full price" tickets (I don't have access to discounted tickets via CAA or other).
(EDIT: since I went to Disneyland and not Disney World, fastpass reservations weren't relevant to me. I assume, had you bought Disney World tickets on TD Expedia, that you would have been unable to make fastpass reservations, but I don't know that for certain).