What's in those 30lbs? To me a 30lbs pack would be kit plus food and fuel for about one week.
That's about it.
Everything for 7 days+ except just 3 days of food rations, T-bags, etc etc (1700g) and 1.5 litres of water (1500g), Water filter kit.
The rest is tent, sleeping bag, mattress, seat pad, pillow (4000g)
Cooking pots, stove, gas, mug, windbreak, bits and pieces, (1100g)
Clothes, trowel, washing kit (2000g)
Satmap GPS, Solar panel, headlight, torch, spare glasses, knife, 1st aid kit, bits & bobs (1500g)
Rucksack (empty) (1700g)
Not all needed for a 'day-hike' but I'd rather carry that than a 'bag of sand'.
At least it makes it worthwhile and the pack is there and ready for the odd multi-day hike.