The Garden Route rewards those who don't seek a WOW around every corner. It is full of gorgeous scenery and opportunities to be in nature. So I'm happy to see that you seem intent on maximising those! Just judging from the general tone of your post and the information contained in it I am quite sure you will find the whole thing trip worthwhile.

I would just caution about the weather. You will be here smack dab in the middle of our rainy season. (And the Garden Route gets more than its fair share - after all, that's what makes gardens grow!) That could mean lots of rather grim, rainy days that make hiking/canoeing etc. (but not wine tasting!) a lot less fun. Or it could mean wonderfully mild weather which is perfect for those activities. So depending on how hard core you are in your pursuits I would just advise that you allow some flexibility to deal with the elements.

And allow enough time for Addo - it is worth it.