I think the 5 lb tanks are the perfect size for those who transport their gear. More portable than the 20 lb tanks, and way more capacity than the 1 lb tanks.
For anybody looking, they will fit in the Menard’s 15% off bag, that deal is going through the 14th, and that discount gets them to under $50. But you will need to get a hose to use with most heaters and grills.
REI currently has the Ignik 5 lb tank WITH the hose on closeout for $76. For those who are not members at REI, they currently have a $30 gift card promotion that essentially gets you the lifetime membership for free.
These 5 lb tanks cost less to fill than the current cost of one 1 lb tank, and give you more than 5 times as much fuel. They are refillable, and legal to transport in your vehicle. Also there is no issue with storing/transporting/disposing of the one pound tanks.