Jay... I think you're dreaming. A camp stove that burns for 8-10 hours and weighs 500 lbs wouldn't likely burn that length of time in someones insulated home. You're tent is not even really "holding" the heat.
I fished those May days too just a little north of where you were. Even in a small rundown cabin we were in with an old small wood stove we couldn't fill that stove full and have it burn good heat for more than 3-4 hours.
Wear some warmer clothes and buy an extra blanket. Use your present woodstove for BLASTS of heat in the morn, after a cold fish on the lake, just before bed, and maybe once in the night after your wizz... and if it's still cold, that huge tent of yours would have no probs running a couple propane heaters in the corners or a sportcat near your big sleeping bag.
You're not that old yet and it's not the "great indoors" man.