A lot depends on your rig and your preferred camping places, but noticing you have a Tioga might mean you are fairly small and perhaps without a toad. The coast of Oregon, and the lower coast of Washington state is certainly worth seeing, but perhaps you have been there before. Come up the east side of the Olympic Penninsula, there are some nice spots along there. Have a reservation on the Coho ferry to Victoria. You get off right in the center of town, it's really worth parking somewhere and walking a bit of the waterfront, seeing the Parliament Buildings and the Empress Hotel and checking our the classic boats in the marina. From there take your time and go to Rathtrevor Park north of Nanaimo and enjoy the trails and the beaches there. Come back to Nanaimo and take the ferry to Horseshoe Bay and head north through Squamish and Pemberton. Camp at Seton Dam and enjoy that. Drive almost to Calgary and come down the Kananaskis Highway, and head to Waterton Lake. Camp right in town there.
That should keep you pretty busy for awhile...enjoy it and thanks for coming.