Accommodations options

*Note* when looking at maps of Halifax and Dartmouth, most don’t give you a sense of just how hilly both cities are. Halifax has flat bits, but is predominantly built around one major hill – the Citadel – and Dartmouth is even more hill-bent. The walk from the Holiday Inn to the Church is very downhill, and the walk to the golf club is slightly uphill. The slight uphill is still bigger than any hills in Ottawa, so something to be considered when planning locations and outings for anyone who may have physical impairments

1. Holiday Inn Halifax Harbourview)-Dartmouth, group rate hotel
10-15 minute walk, 2 minute drive to Brightwood Golf Course; 10-15 minute walk, 2 minute drive to Grace United Church; 25 minute walk, 5 minute drive to Jenny’s parents’ house; 10 minute walk to ferry terminal to access Halifax. Phone 1-902-463-1100 for reservations
Holiday Inn Harbourview website

2. Hampton Inn and Suites Dartmouth Crossing
Heart of a (nice) shopping district. A car needed to access the rest of the city. Phone 1-902-406-7700 for reservations. Hampton Inn and Suites website

3. Plenty of hotels in Halifax. Near the waterfront are the Westin, Marriott, and Delta Halifax. All can be found online. If you want historic and swanky (where royalty stay, though the prices are similar to other Halifax hotels, in the heart of Halifax, but farther from wedding action) try the Lord Nelson Hotel.

4. B&B options:
a. Lakeside Point B&B, phone 1-902-461-1549 Lakeside Point B&B
b. Blockhouse Hill B&B phone 1-902-463-1811 Blockhouse Hill B&B
c. Stern’s Mansion B&B, phone 1-902-465-7414 Stern's Mansion B&B
(plenty more if you google-map B&B in Halifax or Dartmouth. Also, there are some nice Inns that can be found online, eg. Inn on the Lake, Halifax Waverly Inn)

5. Cottages:
There are cottages that are privately owned, and those that are part of a resort/hotel.

I don't know any specific privately-owned cottages, but there are websites where you can find them. Most places require at least a 1-week stay. If you are searching for a specific area and would like to be close to Halifax, the best places to look are Peggy's Cove, St Margaret's Bay, and the Eastern Shore heading up to Musquodoboit. Lunenburg and Chester are within 1 hour of Halifax/Dartmouth.
Cottage finder
NS cottage rental

6. Camping around Halifax/Dartmouth

Your best option is Shubie campground (short for Shubenacadie, a series of canals that stretch from the Halifax harbour inland almost to New Brunswick, on which the native Mi'kmaq used to travel every year). I camped there several times as a kid...it's pretty nice, though the bathrooms are like any public campground. It's about a 10-15 minute drive from the church, reception, and rehearsal dinner bar-b-que. It has a lake front, and lots of trails through the woods around. Camping is on open sites.
Shubie Campground

Woodhaven is also within Halifax city limits. I've never been, but here is the website:
Woodhaven