Could I please get some help regarding proper invitation wording? I’ve looked around these boards at some samples, but I’m not sure if I’ve put everything together correctly. I don't want to break any etiquette rules.
Information: A very large chunk of the wedding is being funded by my parents, but the groom’s parents, and the two of us are also contributing. My parents have stated that they would prefer something simpler that didn’t spell out all of our names, but rather went the “together with their families” route. Also, we are not getting married in a place of worship.
Doing research on invitations, I’ve found out that it is against etiquette for the bride and groom to request the guests’ presence, and if they’re hosting the invitation has to be written in third person. However, the websites I’ve researched has them inviting guests when the “together with their families” is added. This confuses me slightly. Could someone please explain this as well as let me know what I should change here?
Thank you in advance! 
Together with their families
BRIDEFIRST BRIDELAST
and
GROOMFIRST GROOMLAST
(or should the together with their families come after our names?)
Request the pleasure of your company at their wedding
Request the pleasure of your company as they are united in marriage
(Not sure which of these—if any—is more proper)
(please let me know if there is better wording for this)
Saturday, the twenty-seventh of June
two thousand and fifteen
at half past five o’clock in the afternoon
(do I need the dash between twenty-seventh?)
(do I need the o’clock in there? I feel like I do, but I’ve seen it without as well.)
VENUE NAME
VENUE STREET
VENUE TOWN
Reception to follow
I’m not sure what’s supposed to be capitalized (aside from the obvious names, month date, venue title, etc.) and where the commas and periods go. I feel like there should be a ton of commas in here for proper grammar, but no invitations I’ve seen have punctuation, so I would like to double-check this, please.