Chris, make sure you empty your leg bag before it get more than half to two thirds full. I have worn my leg bag across the knee but slightly to one side for the last five years without any issues. I have been very active helping with a house renovation and only damaged a bag a couple of times, usually with an angle grinder 😀. Hopefully you will only be taking gentle walks until the catheter comes out.
I had to have a few dilatations after my main surgery and the nurses were happy to administer a squirt of gel to prevent any soreness in the eye of the penis.
From personal experience of those dilatations our urology ward seems to be a training ground for new nurses. The new nurses, although caring people did not have alot experience on how to set me up with the catheter.
I got a couple of extra G straps/thigh straps. The extra strap is useful for showering. Drain the leg bag remove the leg bag straps make sure the thigh strap is secure and is supporting the empty leg bag. Have your shower , dry yourself , fit the spare strap to the other thigh and transfer the catheter to the the dry strap remove wet strap and dry for next shower.
Thanks Chris