Maximum capacity of soundset in party tents

Tents are very-reflective thus your rig should be fine.
Get your tops above your audience (you will need some sturdy stands) so that announcements can reach the far-side of the tent.

I have done more-than-a-few tent gigs; weddings, etc. and found that I did not need "that much" to fill a tent with sound.

I even did a tent wedding (a couple of years ago) with a pair of Bose 802's over 502BP's and I didn't run it wide-open. That tent was a tad smaller than the one you spec'd.

Your subs will keep the energy directed towards the dance floor (where it should be).
Don't be overly-aggressive; your band does not need to to rock-concert-loud all the way to the back of the tent.....
attendees at a wedding/event "may" want to have a conversation.

just my opinion