Struggling with access over site-to-site VPN

Here's my setup (IPs are made up):

Home-

SG110, dynamic IP on cable modem

Internal- 10.0.0.1

Camper-

Verizon 4g router to "WAN" on desktop running Sophos Home UTM, dynamic IP, Nat'd behind Verizon

Internal- 10.0.1.1

Wireless router configured as access point to provide wireless and 4 port switch

IP camera for monitoring kids sleeping at night (so parents can walk away from camper and know the kids are still in bed!)

Site to site SSL VPN setup and connected

Firewall rules on both ends:
ALLOW - HOME network > CAMPER network

ALLOW - CAMPER network > HOME network

From the camper network, I can access anything on the home side which is fine (file shares on home system, printers, etc)

From the home network, I can ping the different devices on the camper side (access point, IP camera, firewall interface) but I can't access the web interface for any of them. The odd thing part is I can some times get the login prompt for the IP camera or the SSL certificate warning for the firewall but nothing after that.

Speed test:
Home - 25 down x 3 up

Camper - 8-10 down x 8-10 up

File transfers from camper to home result in about a 3mb transfer rate

From inside the camper network, I can access all the devices on the camper network just fine.

Ping times from home to camper are about 70-100ms which isn't the greatest but it should be able to pull up the web interfaces and the video stepped down to 320x240. 

A little background- I had this working last summer and it worked well enough. Over the winter, I re-tasked the system in the camper I was using for the firewall knowing I'd put a better system in place. Well now camping season is approaching and I'm trying to get this going again. 

Ultimately, if it weren't for Verizon and their NAT'ing, I would just open the ports on the camper firewall and access the camera through that connection but since Verizon NATs their hotspots (without a $500 static IP), I'm doing the site-to-site VPN then opening the ports on my home firewall.

I hope this makes sense and someone can give me some ideas on where to look next since I'm smacking my head against a brick wall...and there's not many brain cells left!