I started my first season back to fly fishing really well getting out 2-3 times a wk. But since the beginning of Aug when my daughter was born I haven't got out at all

Its not that many weeks till the end of the season but if I'm lucky I might manage to get out once or twice before then.
I'm pondering my options for fishing after that as I dont really want to have to wait till next spring to get out with a fly rod again!
Never tried coarse fish with a fly but I have the Forth Clyde canal near me and also an old quarry (Auchinstarry) both of which are meant to have coarse fish populations.
I don't really want to have to buy lots of new tackle - I've got a 5/6 wt trion and also an old fibre glass 8 wt
I guess the trion will cover most fish- I'm quite keen to try perch. but I'm tempted to try going after pike as well. On the one hand I read that a 10wt is the min you should use for pike but on the other hand I've also read that there aren't many big ones in the canal - biggest I've heard of was 8lb so I'm not sure if the 8wt would be ok?
Any other places or types of fish I can try for? The closer and cheaper it is the more likely I am to be able to go!