Looking for a volunteer to photograph a proposal!

So I realize this may be a long shot, but I plan to propose to my boyfriend in the next week or two and am wondering if anyone would be willing to volunteer as a photographer? I do not, by any means, expect a professional photographer on a volunteer basis. I would be more than happy with a few cell phone shots taken during the moment, all I am really looking for is for something to remember it by. We are both Canadians who have recently moved to Prague and I would love to have something to show our family back home, but on our current budget I can't really afford a professional photographer.

It might be important to note that we are a same-sex couple, so you must be open to that! Also, if anyone knows an affordable option for a photographer, feel free to let me know. All I have found thus far is in the range of 150-200 euro per hour, which is a bit beyond my reach at this time.

Cheers!

Edit: As of now I'm planning to propose on Petrin Hill after a surprise picnic, in case the location is of concern!