Enjoy!! DLP doesn't require anything like the same planning as WDW. Still using paper FP and ADRs by phone only and just up to 2 months in advance. Most people just book with the concierge on arrival, although if there's somewhere you really want, you might be best calling in advance-cafe mickey, for example, is pretty much always reservation only.
Staying onsite entitles you to 2 hours early entry and it is usually really quiet, but we go off season but still think it's nothing like the emh crowds at WDW. Booking from UK, breakfast is included and assume thid is true for US bookings-because of this most eat at the hotel before heading out. Between 8 and 9:30am the dining room in the hotel can be crazy. Mod and delux require you to wait for a table and that queue can really build and eat into the early entry time. We ask for a 7-7:30am slot and then head to park for early entry at 8am.
You can walk everywhere onsite so don't need to rely on buses but they are there if you need.
It's simple to get to and from Paris, very romantic for a honeymoon - 45mins on the RER into central Paris. The station is right beside the resort bus drop off points at the parks and you can take baggage on the DLP buses. It's easy to get around Paris on the metro (underground) and there's so much to see and do.
Winter months can be cold but the majority of rides are covered because of this. Avoiding big holidays means lower crowds just as at WDW.
WDW is awesome but there's something really lovely about the smaller scale of DLP, it's more intimate and we really enjoy our trips there.
Best wishes for the wedding!