Battery and LP Tank Location Question

I was telling my son and husband my possible locations for the deep cycle battery (which is large and would take up considerable space in my galley), and the 5 lb. LP tank (that I had planned to mount on the tongue and run protected copper tubing under the trailer to the galley in back for connection to the Camp Chef oven/stove), they suggested these two locations behind the fenders and in front of the tail lights. It would shorten the connection between tank and oven; and it would keep battery and LP tank separated. This would also mean I'd have to to take the trailer back to Perham Steel to get two trays welded to the sides of the trailer.
Just use your imagination to picture a wood sided, white vinyl roofed teardrop camper between the two wheels.
My initial reactions were:
1) Not a very protected place for the gas cylinder...could be a BIG problem if I was hit on the side.
2) All the weight is in the back end, I might not have enough tongue weight.
3) The battery is HEAVY. Would it be too lopsided?
4) How would I make the battery theft-proof?
5) Then there's the esthetics.
Opinions? Warnings? Affirmations?
Thanks in advance for your help/wisdom.
Just use your imagination to picture a wood sided, white vinyl roofed teardrop camper between the two wheels.

My initial reactions were:
1) Not a very protected place for the gas cylinder...could be a BIG problem if I was hit on the side.
2) All the weight is in the back end, I might not have enough tongue weight.
3) The battery is HEAVY. Would it be too lopsided?
4) How would I make the battery theft-proof?
5) Then there's the esthetics.
Opinions? Warnings? Affirmations?
Thanks in advance for your help/wisdom.