Where are you starting from the day you want to cross the Lindis? If you are starting from Queenstown then two hours would easily get you to the top of the Lindis.
I must confess that I've been driving this route for over 50 years, and I've never been to the historic hotel site, never even heard of it I am sorry to say. Where exactly is it WL??
There is a very good free overnight camping spot just past Omarama heading north. Turn off left immediately after crossing the Ahuriri River bridge, between Omarama and Henburn Road on this map nzfishing.com/FishingWaters/…AhuririMap.htm
Also on this map you will see a reference to The Cliffs. You can see these sculptured clay cliffs on the left a few kilometers before Omarama. If the sun is in the right position these are quite spectacular. As they are on the far side of the Ahuriri river you have to cross the river to get close to them, so access is via Henburn Road. THey are worth a detour if you have time. To drive in and out, as well as walk 100meters or so to the cliffs will take about 1-1/2 hours. There is a $5 per car fee, which is supposed to be paid at the visitor center at Omarama, but I don't think many people pay. You don't know about it until you are almost at the cliffs, then you have to drive back to Omarama to pay. It's a strange system :)
Also at Omarama
World gliding capital; joy rides in a glider etc.
Really good antique shop with lots of interesting memorabilia, including a display of Zena, warior Princess costumes and sets.
Winery with lovely gardens
Hot Tubs. Haven't tried them yet, but it's on the adgenda.
Great fish & chips from the Omarama Hotel. Bit quirky walking down a long passage to get to the servery window, but the F&C's are really good.
Sculpture of a Merino Ram at the Junction of SH 8 and SH 83.
The Wrinkly Ram. Souvineer shop & restaurant & shearing display etc. Food was a bit dissapointing last time we were there, but its a good place to buy woolen items, sweaters etc. and there is good parking.
So there you are, all you ever wanted to know about Omarama, but never knew what to ask. :)