Warblers are generally not a typical backyard bird even during the migration period.
About the only time I've seen a warbler or two in the backyard was at the absolute
peak of migration, that half day or so when there are birds everywhere, and even
then it is only because of a dense row of cedar trees that provide concealment.
Getting warbler shots is still a matter of visiting a hot spot, the narrow end of the
funnel, where the birds are more concentrated. If you're not there at the right time
you may be out of luck. The peak day for warblers is usually from May 10th to the 16th.
I think it was on the 14th two years in a row at one time. I don't now what is happening
this year. Thickson woods should have been warbler city but it wasn't. Even when I
thought I spotted a warbler (no binoculars) it turned out to be just another RC Kinglet.
Couldn't find a waterthrush, only a couple of Gnatcatchers and hardly any flycatchers,
I don't know whether the peak has passed, or if it will still occur over the next few days.
You would need to hear from someone that is has been doing it for many years.