Looking into Tor blog comments section, you can find some good insights about PTs and Tor detection. In 2014, discussing meek, dcf wrote this interesting comment:
"In my opinion, none of the transports gives you the degree of unobservability you would want if your life were truly at stake. As always, it is a question of risk and resources. Using Tor is probably safer than not using Tor, and pluggable transports are by design harder to detect that plain Tor traffic. But none of the pluggable transports provides strong protection against an adversary who will hurt you for merely using a circumvention tool. Consider that the censor may be recording all traffic, and even if it cannot detect a circumvention tool today, it may be able to in the future, and punish users retroactively.*
Using bridges will probably make harder to detect that you’re using Tor. But it might be best to follow the behavior of other Tor users in your region.