If you have a friend or relative in Canada you can provide his/her address to the immigration officer and your PR card will be mailed there once ready. If not, you'll have to apply for a PRTD at your local embassy later when you want to return back to Canada...if i were you i would try my best to arrange an address in Canada for the PR card delivery.
If you'll be staying in Canada for a couple of weeks , i would advise you to open a bank account and obtain a canadian credit card so you could start building your credit history in Canada this is "very important" for a newcomer! Opening a bank account can be done in 1 day, but you need to have a local address as some important stuff will be mailed to you (credit card/debit card..etc). Also it will be easier for you to move your funds to Canada while you're planning your permanent move i.e. you can simply wire your funds to the canadian account.
Secondly, get your SIN number processed during your short landing trip..it takes less than 5 minutes at any service canada location, you may want to explore your chances of applying for jobs in canada while abroad (its true the chances are slim to get hired while abroad, but it can happen..i've done a number of skype and phone interviews before moving here permanently, although it didn't land me an offer at the time, but it prepared me better for the job search once i returned back to Canada. Each interview is a learning experience, if you learned from your "mistakes" and prepared better for the next one, your SIN will also come handy as a proof of eligibility to work in canada if an employer is interested in hiring you.
just my two cents, good luck with your landing trip and enjoy exploring your new country!