I have drifted a few of the local flows
I have floated the cowichian but i would not recommend it, as there is a lot of sweepers, and log jams. best to talk to a local about that flow.
Floated the Thompson many times in a 8 foot pontoon ( alittle small with camping gear), but i now have a 14 foot driftboat, it is like luxury now, i can carry way more beer and a cooler too..
Floated the Squamish years ago it is hard to find puttins and take out you have to just drive and and find some places.
The river mostly runs close to the road, so you can find a few good spots. Most of the spots you can walk too.
The only one i would recommend would be the thompson, kamloops lake to junipeir is nice or juniper to ashcroft is better with nice runs. Ashcroft to spence bridge is best not floated as the river can get rough, leave it to the jet boats.
I get a taxi at ashcroft and put in at the start of the river from the lake, it is around $90 taxi fair, the drift is best done in 3 days, with a late start one day, and 2 full days. best times are July, August, early Sept, if you go later in Sept the river is full of pinks and soxs, and the trout are hiding in the fast water.
If you want you can EM me.
Good luck,