Not without being very close to them. Even a high-end shotgun mic would not sound very good without being in relative close proximity.
Some options are hanging a mic from the ceiling or "planting" mic. Ether way it must be as close as possible, and run cable to the camcorder or recording device.
Why no wireless?
Oh, while I'm here, I recommend that you make friends with the sound guy and try to get a board feed to record to a standalone recording device with line-in. Then sync that with your video in Vegas. If you can get your hands on an old Creative Labs Nomad Jukebox 3, that's a great HDD recorder that can do high-bitrate mp3 or up to 48kHz uncompressed.
I've used it on several weddings without any problems and find I can pick up both the bride and groom from the single mike with careful placement on the groom. I also have a short shotgun on the second input of the PD-150 so I can back up the radio mike with it as well.
I don't do weddings as a business but do record and mix professional audio for television and have been surprised at the quality this 'cheap' radio mike supplies.
The AZDEN has a limited range, about 100ft is max in ideal conditions, when compared to more professional radio mikes but can be switched between two separate frequencies in case of interference.
It comes with a shoe mount for the receiver but you'll need to get a converter plug for the PD-170 audio input as it comes with a 3.5mm tip and sleeve plug for domestic handycams.
I made a short convertor lead from 3.5mm socket to XLR for my PD-150 and it works well.
Brand new they sell for $235.00 rrp but you should find them around for less.
I've had mine for around ten years now and first used it with a domestic camcorder.