Gerry,
You probably have seen this but, just in case … check this out (about OHIP coverage across Canada)
http://www.health.gov.on.ca/en/public/programs/ohip/outofprovince/travellers.aspx
Note that if you need more than Doctor/Hospital, OHIP recommends supplementary travel insurance.
i.e.
“Typically this coverage (while out-of-province but within Canada) is for insured physician and hospital services only. Therefore, when travelling outside of Ontario but within Canada, the ministry recommends that you obtain private supplementary health insurance for non-physician/non-hospital services. ”
I trust others will chime-in about supply recommendations.
HTH
DDep